Course
Starts and finishes at Boise State University's stadium area, following the Boise River Greenbelt through the city's parks. Marathon, half, 10K, 5K and virtual options; 2026 course maps are to be finalized.
Marathon42.2 km
Half Marathon21.1 km
10K10 km
5K5 km
Key dates
- ★Race dayOctober 2027 · date to be announced
Provisional date, projected from last year — the organiser has not announced this edition yet. We show the month only.
About
The City of Trees Marathon is an annual running event held in Boise, Idaho. The course takes runners through the scenic Boise Greenbelt, offering beautiful views of the city's parks and the Boise River.
Your next race, seen from above.
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Save City of Trees Marathon to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.