When we have race morning history, use that range for planning, not as a promise. Inside about 14 days, the live forecast on this page is the better read. We do not invent a start-hour number when history is not loaded here.
Marathon
City of Trees
Sunday, October 11, 2026Boise, Idaho, USA
Goal time
3:15:00
Adjusted time (preview)
About 125 m of climbing and 125 m of descent. Rolling.
Almost all within 2%No grades over 6%Two climbs
Impacts
Based on the historical mean for the race window over the last 10 years, ±5 days.
Elevation
Heat
Wind
Total Impact
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
- FitOne Half Marathon
- Anchorage Mayor's Marathon
- Asheville Marathon
- Athens Ohio Marathon
- Austin Marathon
- Back Your Badge Marathon
- Bayshore Marathon
- Beantown Marathon
View race map for this area.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for City of Trees.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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