Riders crossing bridge

Speaker Series

Upcoming Speakers

California Central Coast

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Dr. Linda Rudolph

Director of the Center for Climate Change and Health at the Public Health Institute

Dr. Linda Rudolph is the director of the Center for Climate Change and Health at the Public Health Institute. The Center hosts the US Climate and Health Alliance, and Linda works with local health agencies and health professionals to advance climate solutions that promote health and equity. Previously, Dr. Rudolph served as Deputy Director for Chronic Disease Prevention and Health Promotion in the California Department of Public Health, and Health Officer/Public Health Director for the City of Berkeley. She received her MD from UC San Francisco and an MPH from UC Berkeley.


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Chris Field

Perry L. McCarty Director, Stanford Woods Institute; Melvin and Joan Lane Professor for Interdisciplinary Environmental Studies

Chris Field is the Perry L. McCarty Director of the Stanford Woods Institute for the Environment and Melvin and Joan Lane Professor for Interdisciplinary Environmental Studies.  His research focuses on climate change, ranging from work on improving climate models, to prospects for renewable energy systems, to community organizations that can minimize the risk of a tragedy of the commons.   Field was co-chair of Working Group II of the Intergovernmental Panel on Climate Change from 2008-2015, where he led the effort on the IPCC Special Report on “Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation”  (2012) and the Working Group II contribution to the IPCC Fifth Assessment Report (2014) on Impacts, Adaptation, and Vulnerability.  His widely cited work has earned many recognitions, including election to the US National Academy of Sciences, the Max Planck Research Award, and the Roger Revelle Medal. 

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Mary Ellen Hannibal

Journalist and Author

Mary Ellen Hannibal is a long-time Bay Area journalist and author.  Previous books include The Spine of the Continent, about which Publisher's Weekly said, "this is what science writing should be:  fascinating and true." Among other awards, she is the recipient of the National Association of Science Writers Science and Society Award.  She is currently a Stanford media fellow.  Her most recent book, Citizen Scientist was named one of the best nonfiction books of 2016 by the San Francisco Chronicle.

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Jered Lawson

Co-Founder and Co-Director at Pie Ranch

Before co-founding Pie Ranch in 2003, Jered worked with various organizations in California that share a common goal of influencing the way people relate to themselves, each other and the land around them through the development of healthy, local and just food systems.  He's particularly interested in "climate-smart" farming practices. Jered leads the organization's regional advocacy efforts, joins in farm operations, and works with the Board of Directors to raise the necessary support to fulfill the mission and infrastructure improvements of Pie Ranch. Jered lives on the farm with his partner Nancy and their children, Lucas & Rosa and loves to surf when time allows. 

Pacific Northwest Ride

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Michael Stevens

State Director, The Nature Conservancy in Washington

Michael S. Stevens brings twenty years of experience in land and wildlife conservation, sustainable agriculture, conservation biology, business and non-profit leadership to his role as State Director for The Nature Conservancy in Washington. In this role, Mike is charged with vision and oversight for The Conservancy’s work with people and on landscapes across the state. As part of the world’s largest conservation organization, Mike also provides leadership and support to projects across the Northwest and internationally.

Prior to joining The Nature Conservancy in Washington, Mike was Co-Founder and Principal of Pioneer Mountain Group, where from 2007 to 2012 he led the environmental consulting firm on projects in the western United States, Canada, and South America. From 2002 to 2011, he served as President of Lava Lake Land & Livestock, based in Hailey, Idaho. During his time leading PMG and Lava Lake, Mike co-founded and led the Pioneers Alliance and co-founded the Central Idaho Rangelands Network and the Wood River Wolf Project.  From 1999 to 2006, Mike worked with The Nature Conservancy in Idaho and New Hampshire.

Mike’s education includes a MS from the Field Naturalist Program at the University of Vermont and a BA in Biology from Middlebury College. He was born and lived in Spain until he was 11 and has traveled extensively in Asia, South America, and Europe.

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Phil Levin

Lead Scientist, The Nature Conservancy in Washington

Conservation scientist Phillip Levin is the Lead Scientist for The Nature Conservancy in Washington and Professor of Practice at the University of Washington’s College of the Environment. Prior to taking the newly created joint position with UW and the Conservancy, Levin was at NOAA Fisheries Science Center in Seattle where he was Senior Scientist and Director of the Conservation Biology Division.

Levin has received the Department of Commerce Silver Award and NOAA’s Bronze Medal for his work on marine ecosystems, and the Seattle Aquarium’s Conservation Research Award for his work in Puget Sound. He has published over 150 scientific papers in peer-reviewed journals, book chapters, and technical reports, and his work has been featured in such news outlets as NPR, PBS, the BBC, MSBNC, The Economist, among others. His research into Puget Sound’s sixgill sharks was recently featured on “Wildlife Detectives: Mystery Sharks of Seattle” on KCTS-9.

Levin is an editor of the scientific journal, Conservation Letters, recently served as President of the Western Society of Naturalists, and has served on numerous editorial boards and scientific advisory panels. He received his Ph.D. in zoology from the University of New Hampshire in 1993 and was a postdoctoral fellow at the University of North Carolina.

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Rob Smith

Northwest Regional Director, National Parks Conservation Association

Rob Smith returned to the Northwest after many years with the Sierra Club in the Southwest.  Born in Minneapolis, MN, his early years were spent growing up in the Midwest (where he learned to canoe in the Boundary Waters and Quetico Provincial Park) as well as Vancouver, BC, Seattle, WA and Klamath Falls, OR.  Rob went to high school in Seattle, college in Maine (where he often journeyed to Acadia National Park) and then moved West to be in the mountains.  After two years as a railroad brakeman he volunteered to his way into working for the Colorado Open Space Council advocating for forest wilderness protection.  He then joined the Sierra Club, living in Santa Fe, Salt Lake City and finally Phoenix, where he married Joni Bosh, a fellow environmental activist, and together raised two sons, Frank and Carl. For his last three years in Phoenix he bicycled to work every day, a roundtrip of about 24 miles, through freezing temperatures to dangerously hot. The highlight was getting caught in a huge “haboob” dust storm which engulfed the city and was so thick that the street lights came on and he rode into his neighbor’s driveway thinking it was his own.  Today he enjoys commuting by ferry boat and biking on weekends.

Rob and his family enjoy hiking, river running, camping and seeing historic sites, a good combination for visiting National Park System areas.  Rob’s environmental work has included work on land and wildlife protection, climate change and air quality through lobbying officials and organizing local support for conservation measures.  

Death Valley National Park Ride

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David Lamfrom

Director of the California Desert and National Wildlife Programs, NPCA

Since 2008, David Lamfrom has worked in National Parks Conservation Association’s California desert program holding the jobs of field representative, program manager, and currently director of California Desert and Wildlife Programs. In this role, David works on policy, legislation, media, building community, and connecting desert voices to the administration and congress. David has worked to protect tens of thousands of important acres adjacent to California desert parks from inappropriate development. He also worked over nearly a decade to designate 3 new national monuments, including the creation of a new national park service unit.  David is a published author and photographer who worked to develop the Tortoises Through the Lens program to teach diverse desert youth about the desert through photography. The result of that program was a published book of the student’s work telling the conservation story of the desert tortoise. That book was recently printed in the Spanish language. David formerly worked in the fields of wildlife biology and environmental science. He sits on the boards of several desert based organizations and knows the California desert is the most beautiful and important place on Earth.

Gary Spiers


Gary Spiers has been an amateur astronomer for 20 years and is a member of the OldTown Sidewalk Astronomers, a group of astronomers based in Pasadena and Monrovia who are interested in sharing their interest with others. Like the other sidewalk astronomers, Gary shares his passion through public events across California including at Glacier Point in Yosemite, The Huntington Library and Gardens, Descanso Gardens, local schools and libraries, and at his favorite event the Mojave National Preserve Star Party. 

Employed by the California Institute of Technology he works at NASA's Jet Propulsion Laboratory in Pasadena where he specializes in active and passive optical remote sensing. He is the Principal Investigator for CO2LAS, an aircraft instrument that remotely measures atmospheric carbon dioxide using a laser absorption technique; is the lead for the ground optical support instrumentation for calibration and validation of the OCO-3 carbon dioxide measuring instrument due to launch to the International Space Station within 2 years, and is the instrument manager for CARBO, an aircraft demonstrator in early development for the next generation of space-based carbon dioxide measurements. He has also been known to work on laser communications for space vehicles and previously acted as the government expert during the development of the ISS docking sensor used by the SpaceX Dragon vehicle.

Past Speakers

The long (and growing!) list of amazing speakers we've had join us for Climate Ride in the past includes activists, athletes, politicians, businesspeople, authors, and visionaries of all kinds. Please read below to see a list of the interesting people who have given their time to delight, challenge, and inspire the Climate Riders.

Members of Congress and Dignitaries

Senator Sheldon Whitehouse, Rhode Island

Senator Bernie Sanders, Vermont

Senator Benjamin Cardin, Maryland

Senator Jeanne Shaheen, New Hampshire

Former Senator Brian Frosh – Attorney General for the State of Maryland; Former Maryland State Senator

Congressman Earl Blumenauer, Oregon

Congressman Edward Markey, Massachusetts

Congresswoman Donna Edwards, Maryland

Congressman Lloyd Doggett, Texas

Former Congressman Dennis Kucinich, Ohio

State Representative Robyn Gabel - Illinois 18th District

Dr. Klaus Scharioth – Former Ambassador of the Federal Republic of Germany to the United States

Friis Arne Petersen – Former Ambassador of Denmark to the United States (now Danish Ambassador to China)

Mayor Joe Krovoza, City of Davis, California

Mayor Chris Cabaldon, City of West Sacramento


Authors, Artists, and Scientists

Bill McKibben – Leading environmentalist, writer and founder of 350.org

Dr. Philip Duffy – IPCC Nobel Prize Winning Climate Scientist, President & Executive Director, Woods Hole Research Center

Paul Hawken – Environmentalist, entrepreneur, journalist, and author

Josh Dorfman, The Lazy Environmentalist – Writer, host and Sundance Channel star

Chris Jordan – Acclaimed visual artist

Colin Beavan aka NO IMPACT MAN – Author and subject of NIM film

Michael Lemonick – Former Science Writer for Time, Senior Writer at Climate Central

Eugene Linden – Author and acclaimed journalist

David Helvarg – Acclaimed journalist, author and founder of Blue Frontier Campaign

Ben Sollee – Cellist, vocalist and bike touring musician

Marian Westley – A presentation from NOAA's Geophysical Fluid Dynamics Laboratory (GFDL) at Princeton University

Zoë Chafe – MPH, UC Berkeley Energy and Resources Group

Temra Costa – Sustainable food and farming advocate, and author of Farmer Jane: Women Changing the Way We Eat

Peter Lehman – Founding Director of Schatz Energy Research Center, Professor of Environmental Resources Engineering at Humboldt State University

Carl Mears – Senior Scientist, Remote Sensing Systems

Eric Davidson – Adjunct Senior Scientist, Woods Hole Research Center & President American Geophysical Union

Richard Oppenlander – Consultant & Researcher; Author of ‘Comfortably Unaware’

Edward Parson – UCLA School of Law, Faculty Co-Director of the Emmett Institute on Climate Change and the Environment

Howard Frumkin – Dean, School Of Public Health, University Of Washington

AshEl Eldridge – Producer and Vocalist; Earth Amplified

Dan Fagre – Research Ecologist and Climate Change Research Coordinator, Northern Rocky Mountain Science Center of the U. S. Geological Survey

Peter Furth - Professor of Civil Engineering, Northeastern University

Seth Darling - Nanoscientist, Argonne National Laboratory

Jean Talbert - Obstetrician Gynecologist


Non-Profit and Thought Leaders

Joel Brammeier ­– President and CEO, Alliance for the Great Lakes

Garett Brennan – Artist for 1% for the Planet and Clif Green Notes, Executive Director, Focus the Nation

Jim Brown - Executive Director, Sacramento Area Bicyclist Association

Noah Budnick – Executive Director, San Francisco Bicycle Coalition

Rebecca Calahan Klein – Vice President, Organizational Development at 1% For the Planet

Dave Campbell – Program Director for the East Bay Bicycle Coalition

Andy Clarke – President, League of American Bicyclists

David Coale – Acterra's home energy audits to reduce energy use and GHG emissions in the home

Stuart Cohen – Executive Director, TransForm 

Kate Colarulli – Associate Campaign Director, Beyond Oil, Sierra Club

Mikael Colville-Andersen - Denmark's Bicycle Ambassador

Lisa Daniels – Executive Director, Windustry 

Amanda Eaken – Deputy Director of Sustainable Communities with the Natural Resources Defense Council (NRDC)

Michael Eckhart – Founding President, ACORE (American Council on Renewable Energy)

AshEL Eldridge – Lead Educator, Alliance for Climate Education

Jenn Fox – Director of Strategic Planning at ClimateWorks

Adam Garcia – Policy Researcher, Greenbelt Alliance

Deborah Goldberg – Managing Attorney, EarthJustice

Alisa Gravitz --President, Green America

Mary Lauran Hall – Communications Director, Alliance for Biking and Walking

Brad Heavner – Director of Development, Climate Protection Campaign

Bracken Hendricks – Senior Fellow, Center for American Progress

Jamie Henn – 350.org Communications and Development Director

Dermot Hikisch – B Lab

Rachel Hood-Petroelje - Executive Director, West Michigan Environmental Action Council

Colin Hughes – Director of National Policy, The Institute for Transportation and Development Policy

Michael Jamison – Crown of the Continent Program Manager, National Parks Conservation Association

Jason Kowalski – Policy Coordinator, 1Sky campaigns for energy and climate legislation

Selena Kyle – Staff Attorney, Natural Resources Defense Council

Janet Larsen – Director, Earth Policy Institute

Dan Lashof – Climate and Clean Air Program Director, Natural Resources Defense Council

Keith Laughlin – President, Rails-to-Trails Conservancy

Alvin Lin – China Climate and Energy Policy Director at Natural Resources Defense Council, Beijing

Cory MacNulty - Southwest Senior Program Manager, National Parks Conservation Association

Jeremy Madsen – Executive Director, Greenbelt Alliance

Cy Maramangalam – DC Lead Educator, Alliance for Climate Education

Josh Mogerman – Deputy Director of National Media Program, NRDC

Suma Peesapati - Staff Attorney, EarthJustice

Trina Peterson – Director of Development, 1% For the Planet

Mark Preiss - CEO, Glacier National Park Conservancy

Alison Riley – Adventure Cycling Association

Renee Rivera – Executive Director, Bike East Bay

Nicole Rom – Executive Director, Will Steger Foundation

Dirk Rosen – Executive Director, Marine Applied Research and Exploration (MARE)

Hardik Savalia – Head of ratings at B Lab

Samuel P. Schuchat – Executive Officer, State of California Coastal Conservancy

Leah Shahum – Executive Director, San Francisco Bicycle Coalition

Paul Shapiro – Vice President, Farm Animal Protection, Humane Society of the United States

Elizabeth Shope – Advocate, International Program, Tar Sands/Keystone XL & Global Safe Drinking Water Project at Natural Resources Defense Council

Ed Stierli – Field Representative for Chesapeake and Virginia Program, NPCA

Ben Strauss - Executive Director, Climate Central, Princeton University

Ethan Spotts – Former Marketing Director, Active Transportation Alliance

Randy Swisher – Former Executive Director, American Wind Energy Association

Carolyn Szczepanski – Communications Coordinator, Alliance for Biking and Walking

Betsy Taylor - President, 1Sky, Founder, Center for the New American Dream

Mike Tidwell – President, Chesapeake Climate Action Network

Wood Turner - Executive Director, Climate Counts

Ryan Valdez – Senior Manager of Conservation Science and Policy, NPCA

Lauren Van Ham – Interfaith Eco-Chaplain and Sustainability Consultant

Brian von Herzen – Executive Director, Climate Foundation

Gernot Wagner – Senior Economist, Environmental Defense Fund

Derek Walker – Director of Strategic Climate Initiatives at Environmental Defense Fund

Mark Wenzler – Vice President of Conservation Programs, National Parks Conservation Association

Corinne Winter – Executive Director, Silicon Valley Bicycle Coalition 


Business and Government Leaders

Adrien Benepe - NYC Parks and Recreation Commissioner

Rosi Kerr – Dartmouth College, Director of Sustainability

Dan Garofalo – University of Pennsylvania, Sustainability Coordinator

Dr. Marcus Schmidt  ̶  Senior Director, Germany Trade & Invest

Guillaume Gauthereau – Founder of Sequoia Lab

Susan Green – Director of Finance, Working Assets/Credo Mobile

Øystein Hjelm – Design Manager at Cambi (working on biogas plant at the Blue Plains WWTP in Washington DC)

Brad Jacobson – AIA, LEED® AP BD+C, Senior Associate, EHDD.

Keegan Eisenstadt – President and CEO of ClearSky Climate Solutions

David Arkin – AIA, LEED AP. A leader in straw-bale construction.

Jeff Lesk – Managing Partner, LEED AP, Nixon-Peabody Washington DC. .

Nils Moe – Mayor's Sustainability Advisor for the City of Berkeley

Johanna Gregory Partin – Director of Climate Protection Initiatives, Office of San Francisco Mayor Edwin M. Lee

Harriet Tregoning – Director of the Washington DC Office of Planning

Daniel Mira Salama – Sustainable Development Network at the World Bank

Josh Lasky  – Sustainability Manager and Adjunct Professor at the University of the District of Columbia

Ray Porfilio – Architecture 2030

Melanie Nutter – Director, SF Environment

Frankie Ridolfi – Vice President of Marketing, Free Range Studios 

Tim Frick – Entrepreneur; Principal of Mightybytes, creators of Ecograder; Author, Return on Engagement

Monika Weber-Fahr – Director, Knowledge, Learning & Results, Sustainable Development Network, The World Bank

Antonia Sohns – Water and Energy Analyst, The World Bank

Bill LeBlanc - President of Boulder Energy Group and Senior Advisor at E Source

Assemblymember Wesley Chesbro – California

Assemblymember Phil Ting – California District 19

Laura Castellini – Sustainability Coordinator, Golden Gate National Recreation Area

Alexis Fox - Co-Founder and CEO, Lighter

Chris Cook - Commissioner, Boston Parks and Recreation

Nate Kipnis - Principal and Designer, Kipnis Architecture + Planning

Jeff Mow - Superintendent, Glacier National Park

Ifan Thomas - Field Unit Superintendent, Waterton Lakes National Park

David Shaw - Managing Partner, Black Point Group


Leading Athletes

Brendan Brazier – Ironman Triathlete, Ultramarathon Champion, Author, Vegan athlete

Gary Fisher - Inventor of the mountain bike

Alison Gannett – U.S. Champion Freeskier and Founder, Save Our Snow Foundation

Ruthie Matthes – World Champion, National Champion, and Olympic mountain biker, U.S. Bicycling Hall of Fame

Roz Savage, International Rower – 1st woman to solo row Pacific and Atlantic Oceans