Idaho Running Day
Idaho Running Day race day weather
Cool conditions, steady finish
Runners will face a comfortable temperature trend from 46°F at the start to 60°F at the finish, with light winds not impacting performance. With an average humidity of 46%, conditions remain favorable for maintaining pace. The flat course will allow runners to settle into a rhythm, but adjustments may be necessary if temperatures rise unexpectedly. Overall, hydration should be prioritized as temperatures climb into the late morning.
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Idaho Running Day route and elevation
The Idaho Running Day course has about 255 ft (78 m) of climbing and 258 ft (79 m) of descent, and finishes near the elevation it starts. It is flatter than 57% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. It has no steep miles: no mile climbs more than 40 ft (12 m).
Biggest climbs
- Miles 13.9 to 25.2: climbs about 165 ft (51 m).
What the hills cost
- 3:30 on a flat course is about 3:30:50 here (50 seconds slower).
- 4:00 on a flat course is about 4:01 here (1 minute slower).
- 4:30 on a flat course is about 4:31 here (1 minute slower).
Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.
Even-effort splits for a 3:30, 4:00 or 4:30 finish
| Mile | Climb | Descent | 3:30 | 4:00 | 4:30 |
|---|---|---|---|---|---|
| 1 | 17 ft | 27 ft | 7:56 | 9:04 | 10:12 |
| 2 | 11 ft | 14 ft | 7:58 | 9:06 | 10:15 |
| 3 | 9 ft | 19 ft | 7:56 | 9:05 | 10:12 |
| 4 | 11 ft | 5 ft | 8:02 | 9:10 | 10:19 |
| 5 | 4 ft | 31 ft | 7:53 | 9:00 | 10:08 |
| 6 | 0 ft | 37 ft | 7:50 | 8:58 | 10:04 |
| 7 | 6 ft | 6 ft | 7:58 | 9:07 | 10:16 |
| 8 | 1 ft | 23 ft | 7:54 | 9:01 | 10:09 |
| 9 | 2 ft | 10 ft | 7:57 | 9:05 | 10:13 |
| 10 | 0 ft | 21 ft | 7:53 | 9:01 | 10:09 |
| 11 | 4 ft | 20 ft | 7:55 | 9:03 | 10:11 |
| 12 | 0 ft | 10 ft | 7:57 | 9:04 | 10:12 |
| 13 | 11 ft | 21 ft | 7:56 | 9:05 | 10:13 |
| 14 | 20 ft | 11 ft | 8:04 | 9:12 | 10:21 |
| 15 | 12 ft | 1 ft | 8:04 | 9:14 | 10:23 |
| 16 | 17 ft | 5 ft | 8:04 | 9:14 | 10:23 |
| 17 | 19 ft | 0 ft | 8:09 | 9:18 | 10:27 |
| 18 | 9 ft | 2 ft | 8:02 | 9:11 | 10:21 |
| 19 | 21 ft | 1 ft | 8:09 | 9:18 | 10:28 |
| 20 | 13 ft | 9 ft | 8:01 | 9:10 | 10:19 |
| 21 | 24 ft | 0 ft | 8:11 | 9:21 | 10:31 |
| 22 | 40 ft | 1 ft | 8:18 | 9:29 | 10:40 |
| 23 | 13 ft | 13 ft | 7:58 | 9:07 | 10:15 |
| 24 | 17 ft | 2 ft | 8:07 | 9:17 | 10:26 |
| 25 | 7 ft | 13 ft | 7:57 | 9:05 | 10:14 |
| 26 | 24 ft | 21 ft | 8:01 | 9:10 | 10:18 |
| Last 0.2 | 9 ft | 4 ft | 1:50 | 2:05 | 2:21 |
Explore the Idaho Running Day course with the weather and your pace along the route, or compare it with other races.
Get your personalized Idaho Running Day race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
About the Idaho Running Day
Idaho Running Day is a fall running event in Boise, Idaho, with a marathon, half marathon, 10K and 5K. Every distance starts and finishes at Sandy Point in Lucky Peak State Park and runs out and back along the Boise River Greenbelt. The marathon is a certified Boston qualifying course. The race was formerly called the Idaho Running Company Marathon. Source
