- Weather
- 49°Ftypical start
- Field size
- ~400 runners
- Course
- Flat
- Elevation
- 150 ft gain · 0 ft net
Event: Full Marathon Slow Racers - Over 6 Hrs 30 Min to finish
PR9.1Weather9.1Experience6.0
All marathons
Mid-October · Mountain West · Loop
Boise Marathon (Onward)
Boise, ID
Flat course along Boise River Greenbelt
- Best for PR
- Boston Qualifier
Opens the race organizer's website
- Typical start temp
- 45°F(estimated)
- Field size
- ~1,000 runners(estimated)
- Course
- Flat
- Elevation
- 200 ft gain(estimated)
Why runners choose this race
A loop course around Boise, ID, with very little meaningful elevation change.
Good fit if
- · PR attempts
- · Boston qualification
- · Runners who want a low-key start
Think twice if
- No notable warnings in the data.
Course and logistics
- Course type
- Loop
- Surface
- Road
- Total gain
- 200 ft(estimated)
- Field size
- ~1,000 runners(estimated)
- Crowd support
- Pockets of spectators
- Entry
- Data coming soon
- Start / finish
- Start and finish in the same area
Race details
- Typical timing
- Mid-October
- Region
- Mountain West
- Editorial tier
- Featured
- Data last reviewed
- 2026-08-26
Flat course along Boise River Greenbelt
Good to know
- Best for PR
- Boston Qualifier
- Loop course
- Flat course
- Destination race
Race-day weather
Modelled from location, month and coastal proximity — not verified race history.
ExcellentGoodWarmHeat risk
Typical start sits at 45°F — excellent marathon conditions.
Similar races
- Weather
- 49°Ftypical start
- Field size
- ~500 runners
- Course
- Flat
- Elevation
- 150 ft gain · 0 ft net
Event listed as: Marathon
PR9.1Weather9.0Experience6.1
- Weather
- 47°Ftypical start
- Field size
- ~1,000 runners
- Course
- Flat
- Elevation
- 100 ft gain
Fast coastal North Carolina qualifier
PR9.4Weather9.2Experience7.2