Flat grade share
- Idaho Falls Marathon Half Marathon
- 96.0% Favoured
Idaho Falls Marathon Half Marathon vs Idaho Falls Marathon 5K
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 Idaho Falls Marathon 5K — which comes out ahead?
Idaho Falls Marathon Half Marathon has the stronger available profile on flat grade share, course flatness and scenery score.
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%
Idaho Falls Marathon 5K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.3%
- flat grade share
- 88.2%
- lower ascent
- 19 m
- climbing density
- 3.8 m/km
- net elevation
- 0 m
- maximum grade
- 6.0%
| Metric | Idaho Falls Marathon Half Marathon | Idaho Falls Marathon 5K |
|---|---|---|
| Flat grade share | 96.0% ✓ | 88.2% |
| GAP factor (% slower than flat) | 0.1% ✓ | 0.3% |
| Uphill share | 2.1% | 5.7% |
| Steep-up share | 0.1% | 0.0% |
| Downhill share | 1.9% | 6.1% |
| Total ascent (m) | 50 m | 19 m |
| Climbing density (m/km) | 2.4 m/km | 3.8 m/km |
| Longest climb length (m) | 1,490 m | 340 m |
| Longest climb gain (m) | 11 m | 8 m |
| Longest climb average grade | 0.7% | 2.3% |
| Total descent (m) | 52 m | 19 m |
| Net elevation (m) | -3 m | 0 m |
| Max absolute grade | 9.1% | 6.0% |
| Start elevation (m) | 1,431 m | 1,431 m |
| Finish elevation (m) | 1,428 m | 1,431 m |
| Scenic score | 76/100 ✓ | 70/100 |
| Conditions | 43/100 | 43/100 |
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)
- Idaho Falls Marathon 5K
- 3.8 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)
- Idaho Falls Marathon 5K
- 1,431 m
Finish elevation (m)
- Idaho Falls Marathon 5K
- 1,431 m
Scenic score
- Idaho Falls Marathon Half Marathon
- 76/100 Favoured
- Idaho Falls Marathon 5K
- 70/100
Conditions
- Idaho Falls Marathon 5K
- 43/100
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.
Same-distance comparisons are most meaningful; cross-distance metrics are contextual.
Race facts that change the decision
| Fact | Idaho Falls Marathon Half Marathon | Idaho Falls Marathon 5K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-07-25 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-07-25 (legacy event-level date). |
| Location | Idaho Falls, Idaho | Idaho Falls, Idaho |
| Actual distance | 21.1 km | 5 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Loop | Unavailable |
| Elevation character | Flat | Unavailable |
| Terrain | Road | Road |
| Scenery | Waterfront, Countryside, Riverside, City, Historic, Parkland | Waterfront, Countryside, Riverside, City, Historic, Parkland |
| Atmosphere | Community, Charity | Community, Charity |
| Total ascent | 50 m | 19 m |
| Climbing density | 2.4 m/km | 3.8 m/km |
| Total descent | 52 m | 19 m |
| Net elevation | -3 m | 0 m |
| Max absolute grade | 9.1% | 6.0% |
| Flat grade share | 96.0% | 88.2% |
| GAP factor | 0.1% | 0.3% |
| Cutoff | 5:00:00 | 2:00:00 |
| 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).
- Idaho Falls Marathon 5K
Exact race date not confirmed. Event weekend starts 2026-07-25 (legacy event-level date).
Location
- Idaho Falls Marathon Half Marathon
- Idaho Falls, Idaho
- Idaho Falls Marathon 5K
- Idaho Falls, Idaho
Actual distance
- Idaho Falls Marathon Half Marathon
- 21.1 km
- Idaho Falls Marathon 5K
- 5 km
raceindex.org mapped route held
- Idaho Falls Marathon Half Marathon
- Held
- Idaho Falls Marathon 5K
- Held
raceindex.org elevation profile held
- Idaho Falls Marathon Half Marathon
- Held
- Idaho Falls Marathon 5K
- Held
Course type
- Idaho Falls Marathon Half Marathon
- Loop
- Idaho Falls Marathon 5K
- Unavailable
Elevation character
- Idaho Falls Marathon Half Marathon
- Flat
- Idaho Falls Marathon 5K
- Unavailable
Terrain
- Idaho Falls Marathon Half Marathon
- Road
- Idaho Falls Marathon 5K
- Road
Scenery
- Idaho Falls Marathon Half Marathon
- Waterfront, Countryside, Riverside, City, Historic, Parkland
- Idaho Falls Marathon 5K
- Waterfront, Countryside, Riverside, City, Historic, Parkland
Atmosphere
- Idaho Falls Marathon Half Marathon
- Community, Charity
- Idaho Falls Marathon 5K
- Community, Charity
Total ascent
- Idaho Falls Marathon Half Marathon
- 50 m
- Idaho Falls Marathon 5K
- 19 m
Climbing density
- Idaho Falls Marathon Half Marathon
- 2.4 m/km
- Idaho Falls Marathon 5K
- 3.8 m/km
Total descent
- Idaho Falls Marathon Half Marathon
- 52 m
- Idaho Falls Marathon 5K
- 19 m
Net elevation
- Idaho Falls Marathon Half Marathon
- -3 m
- Idaho Falls Marathon 5K
- 0 m
Max absolute grade
- Idaho Falls Marathon Half Marathon
- 9.1%
- Idaho Falls Marathon 5K
- 6.0%
Flat grade share
- Idaho Falls Marathon Half Marathon
- 96.0%
- Idaho Falls Marathon 5K
- 88.2%
GAP factor
- Idaho Falls Marathon Half Marathon
- 0.1%
- Idaho Falls Marathon 5K
- 0.3%
Cutoff
- Idaho Falls Marathon Half Marathon
- 5:00:00
- Idaho Falls Marathon 5K
- 2:00:00
Entry model
- Idaho Falls Marathon Half Marathon
- Open
- Idaho Falls Marathon 5K
- 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 Idaho Falls Marathon 5K?
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.