Boise River Marathon, Half Marathon, 10k, & 5k

Saturday, May 4, 2024 • Boise, ID

Boise River, a great location for the Boise River Half Marathon, offering recreation and scenic beauty.

Welcome to the Boise River Marathon, Half Marathon, 10k, and 5k! 

Scenic Views. Often touted as one of the most scenic courses in the entire state of Idaho, let alone the entirety of the United States, the Boise River Half Marathon takes runners through the beautiful state for an incredible early spring race. 

Starting in Ann Morrison Park, this course takes runners along the scenic banks of the Boise River, with awe-inspiring forestry and landscapes surrounding it. 

Starting in the “Solar System” far east on the Greenbelt at Lucky Peak State Park, the half marathon kicks off at 7:00 a.m. 

Taking runners around the Boise River Greenbelt, the half marathon follows a looping out-and-back course. With one confusing detour this year due to a partial Greenbelt Closure, runners are encouraged to study the course map to ensure to mistakes are made. 

Fully stocked aid stations will be posted every two (2) miles, so runners don’t need to worry about self-sufficient fuelling and hydration. A total of seven (7) aid stations comprise the half marathon course. 

All finishers will receive a commemorative finisher’s medal, with the top three male and female finishers being recognized with additional awards. 

Race Weather & Climate

On May 4 in Boise, Idaho, the climate typically features a comfortable springtime weather pattern. The average high temperature hovers around 68°F (20°C), while the average low temperature falls to about 45°F (7°C). Precipitation levels are relatively low during this month, with May receiving an average of 0.85 inches of rainfall. Located in southwestern Idaho, Boise in May enjoys an arid climate.

Boise River Half Marathon Results

Boise River Half Marathon Course Map

See the race route map for the Boise Half Marathon on the race director’s website here.

Starting Time

  • 7AM MDT – Marathon
  • 7AM MDT – Half Marathon
  • 8AM MDT – 10k Marathon
  • 8AM MDT – 5k Marathon

Course Limit

  • 7 hours – Marathon
  • 7 hours – Half Marathon
  • 6 hours – 10k Marathon
  • 6 hours – 5k Marathon

Boise River Half Marathon Fees

  • $95 for the Marathon
  • $75 for the Half Marathon
  • $55 for the 10k Marathon
  • $45 for the 5k Marathon

Boise River Half Marathon Registration

You can find the registration information for all distances on RunSignup.

Official Race Website

Additional race information can be found at

See more races in: May, Idaho