Flat grade share
- Idaho Falls Marathon Half Marathon
- 96.0% Favoured
Idaho Falls Marathon Half Marathon vs Spring Dash (Coeur d'Alene) Half Marathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofIdaho Falls Marathon Half Marathon or Spring Dash (Coeur d'Alene) Half Marathon — which comes out ahead?
Idaho Falls Marathon Half Marathon and Spring Dash (Coeur d'Alene) Half Marathon split the available advantages, so the better choice depends on which metric matters most to the runner.
Route comparison snapshot
Idaho Falls Marathon Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.1% Favoured
- flat grade share
- 96.0% Favoured
- lower ascent
- 50 m
- climbing density
- 2.4 m/km
- net elevation
- -3 m
- maximum grade
- 9.1%
Spring Dash (Coeur d'Alene) Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 2.9%
- flat grade share
- 40.7%
- lower ascent
- 368 m
- climbing density
- 17.4 m/km
- net elevation
- 0 m
- maximum grade
- 16.9%
| Metric | Idaho Falls Marathon Half Marathon | Spring Dash (Coeur d'Alene) Half Marathon |
|---|---|---|
| Flat grade share | 96.0% ✓ | 40.7% |
| GAP factor (% slower than flat) | 0.1% ✓ | 2.9% |
| Uphill share | 2.1% | 29.6% |
| Steep-up share | 0.1% | 9.0% |
| Downhill share | 1.9% | 29.7% |
| Total ascent (m) | 50 m | 368 m |
| Climbing density (m/km) | 2.4 m/km | 17.4 m/km |
| Longest climb length (m) | 1,490 m | 810 m |
| Longest climb gain (m) | 11 m | 55 m |
| Longest climb average grade | 0.7% | 6.7% |
| Total descent (m) | 52 m | 367 m |
| Net elevation (m) | -3 m | 0 m |
| Max absolute grade | 9.1% | 16.9% |
| Start elevation (m) | 1,431 m | 660 m |
| Finish elevation (m) | 1,428 m | 660 m |
| Scenic score | 76/100 | 81/100 ✓ |
| Conditions | 43/100 | 96/100 ✓ |
GAP factor (% slower than flat)
- Idaho Falls Marathon Half Marathon
- 0.1% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
Longest climb length (m)
Longest climb gain (m)
Longest climb average grade
Total descent (m)
Net elevation (m)
Max absolute grade
Start elevation (m)
Finish elevation (m)
Scenic score
- Spring Dash (Coeur d'Alene) Half Marathon
- 81/100 Favoured
Conditions
- Spring Dash (Coeur d'Alene) Half Marathon
- 96/100 Favoured
Only metrics available for at least one side are shown. A ✓ marks the better value for each metric (higher-is-better aware). Scores are out of 100 when available. Ascent, climbing density, max absolute grade and median finish describe course or field context and are not marked as better or worse.
Race facts that change the decision
| Fact | Idaho Falls Marathon Half Marathon | Spring Dash (Coeur d'Alene) Half Marathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-07-25 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-04-25 (legacy event-level date). |
| Location | Idaho Falls, Idaho | Coeur d'Alene, Idaho |
| Actual distance | 21.1 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Loop | Out And Back |
| Surface | Unavailable | Paved |
| Elevation character | Flat | Flat |
| Terrain | Road | Unavailable |
| Scenery | Waterfront, Countryside, Riverside, City, Historic, Parkland | City, Coastal, Waterfront, Parkland, Lakeside |
| Atmosphere | Community, Charity | Unavailable |
| Technicality | Unavailable | Non Technical |
| Total ascent | 50 m | 368 m |
| Climbing density | 2.4 m/km | 17.4 m/km |
| Total descent | 52 m | 367 m |
| Net elevation | -3 m | 0 m |
| Max absolute grade | 9.1% | 16.9% |
| Flat grade share | 96.0% | 40.7% |
| GAP factor | 0.1% | 2.9% |
| Cutoff | 5:00:00 | Unavailable |
| Entry model | Open | Open |
Schedule
- Idaho Falls Marathon Half Marathon
Exact race date not confirmed. Event weekend starts 2026-07-25 (legacy event-level date).
- Spring Dash (Coeur d'Alene) Half Marathon
Exact race date not confirmed. Event weekend starts 2026-04-25 (legacy event-level date).
Location
- Idaho Falls Marathon Half Marathon
- Idaho Falls, Idaho
- Spring Dash (Coeur d'Alene) Half Marathon
- Coeur d'Alene, Idaho
Actual distance
- Idaho Falls Marathon Half Marathon
- 21.1 km
- Spring Dash (Coeur d'Alene) Half Marathon
- 21.1 km
raceindex.org mapped route held
- Idaho Falls Marathon Half Marathon
- Held
- Spring Dash (Coeur d'Alene) Half Marathon
- Held
raceindex.org elevation profile held
- Idaho Falls Marathon Half Marathon
- Held
- Spring Dash (Coeur d'Alene) Half Marathon
- Held
Course type
- Idaho Falls Marathon Half Marathon
- Loop
- Spring Dash (Coeur d'Alene) Half Marathon
- Out And Back
Surface
- Idaho Falls Marathon Half Marathon
- Unavailable
- Spring Dash (Coeur d'Alene) Half Marathon
- Paved
Elevation character
- Idaho Falls Marathon Half Marathon
- Flat
- Spring Dash (Coeur d'Alene) Half Marathon
- Flat
Terrain
- Idaho Falls Marathon Half Marathon
- Road
- Spring Dash (Coeur d'Alene) Half Marathon
- Unavailable
Scenery
- Idaho Falls Marathon Half Marathon
- Waterfront, Countryside, Riverside, City, Historic, Parkland
- Spring Dash (Coeur d'Alene) Half Marathon
- City, Coastal, Waterfront, Parkland, Lakeside
Atmosphere
- Idaho Falls Marathon Half Marathon
- Community, Charity
- Spring Dash (Coeur d'Alene) Half Marathon
- Unavailable
Technicality
- Idaho Falls Marathon Half Marathon
- Unavailable
- Spring Dash (Coeur d'Alene) Half Marathon
- Non Technical
Total ascent
- Idaho Falls Marathon Half Marathon
- 50 m
- Spring Dash (Coeur d'Alene) Half Marathon
- 368 m
Climbing density
- Idaho Falls Marathon Half Marathon
- 2.4 m/km
- Spring Dash (Coeur d'Alene) Half Marathon
- 17.4 m/km
Total descent
- Idaho Falls Marathon Half Marathon
- 52 m
- Spring Dash (Coeur d'Alene) Half Marathon
- 367 m
Net elevation
- Idaho Falls Marathon Half Marathon
- -3 m
- Spring Dash (Coeur d'Alene) Half Marathon
- 0 m
Max absolute grade
- Idaho Falls Marathon Half Marathon
- 9.1%
- Spring Dash (Coeur d'Alene) Half Marathon
- 16.9%
Flat grade share
- Idaho Falls Marathon Half Marathon
- 96.0%
- Spring Dash (Coeur d'Alene) Half Marathon
- 40.7%
GAP factor
- Idaho Falls Marathon Half Marathon
- 0.1%
- Spring Dash (Coeur d'Alene) Half Marathon
- 2.9%
Cutoff
- Idaho Falls Marathon Half Marathon
- 5:00:00
- Spring Dash (Coeur d'Alene) Half Marathon
- Unavailable
Entry model
- Idaho Falls Marathon Half Marathon
- Open
- Spring Dash (Coeur d'Alene) Half Marathon
- Open
Facts are shown only when they exist in the sourced race record; Not held means no sourced value is held for that race.
Common questions
Which is flatter, Idaho Falls Marathon Half Marathon or Spring Dash (Coeur d'Alene) Half Marathon?
Idaho Falls Marathon Half Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.