In nearly two years of cycling, David Kroodsma and Bill Bradlee biked a combined 25,000 miles, gave 150 presentations on global warming at schools and community centers, and appeared in over 70 media outlets across 16 countries.

This website documents their travels and efforts to raise awareness of climate change: David's solo trip from California to the tip of South America and David and Bill's journey across the United States. Click on the maps below to learn more.

David is currently finishing a book about his two years on the road, tentativeliy titled The Bicycle Diaries: a 21,000-mile ride for the climate. To read the working introduction to this book, click here. To receive updates, enter your email address below.