Bay Day Trail Challenge

October 1 – 31, 2021

Connect, Explore, and Discover the San Francisco Bay Trail

Sign Up


Take on the 25-Mile Challenge, and connect with the Bay whenever and however you choose. You will have a full month to explore the San Francisco Bay Trail, which spans 350 miles throughout all 9 Bay Area counties, and connects communities to parks, open spaces, and to each other. There are so many options!

This event is free of charge!

Sign Up


Participate in FIVE activities of your choice-- on the trail, or even in your own neighborhood! For this highly flexible and customizable challenge, discover the Bay however you want and wherever you are. Whether it’s kite flying, bird-watching, picnicking, or connecting with local culture through history-filled audio tours, there are so many ways to explore.

This event is free of charge!

Sign Up


Take the Bay Day Trail Challenge  with friends, family, colleagues, or club members! You can create or join a team when you sign-up for the Challenge or after you've completed registration. Track your mileage and activities together and get the competition going!


If you're a Bay Day sponsor, your team has been pre-loaded for you and your employees. A password is required to join. Reach out to your internal lead for more information

Team FAQ Team Lookup


Everyone who completes the Bay Day Trail Challenge will be entered to win a grand prize $300 gift certificate from our friends at REI and a 1 year membership to AllTrails Pro. 10 runners up will receive 1 year membership to AllTrails Pro and AllTrails swag to help guide their next trail adventure.

Get Ready for Bay Day!

About the Bay Day Trail Challenge

Explore our trail guide for tips and inspiration, or find the answers to your registration questions

Bay Day Trail Guide FAQs

Total Miles and Activities Completed

25 Mile Challenge

Total Miles

11,540.789 miles

Five Bay-Related Activities



Brought to you by

IBM Bay Area   Facebook


Select an option to submit your results or view individual & team results.

Submit Your Results View Results

If you continue to use this site, you consent to use all cookies. We use cookies to offer you a better browsing experience. Read how we use cookies and how you can control them by visiting our Privacy Policy.

If you continue to use this site, you consent to use all cookies.