Boise Greenbelt Relays & 50 Mile Ultra – Boise, ID 2026

Tackle the full Boise River Greenbelt on a beautiful loop course with a team of your friends on Saturday, May 9th 2026 ! Join us for the only relay race in the Treasure Valley at the second annual Boise Greenbelt Relays. New this year is a FULL 50 Mile Ultra Distance for Solo Runners. JOIN US Teams of two (2) , Teams of four (4) , Teams of six/seven (6 or 7 for one per leg!) or solo runners will collectively complete 45 miles (50 for the Solo Ultra Course) looping the entire span of the Boise River Greenbelt through central Boise, Garden City, Eagle, and Southeast Boise. The race will start and finish at Ann Morrison Park on Saturday, May 9th 2026. New This Year! The solo event will be FIFTY (50) miles! Come tackle one of the fastest & flatest, non-looped 50 mile courses in Northwest. Please note that the course closes at 5PM! If you (running solo) or your team are concerned about finishing within this window, please reach out directly to us at info@boiserunning.com and we'll work with