Flat grade share
- Spokane River Run 25K
- 63.0% Favoured
Spokane River Run Ultramarathon vs Spokane River Run 25K
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofSpokane River Run Ultramarathon or Spokane River Run 25K — which comes out ahead?
Spokane River Run 25K has the stronger available profile on flat grade share and course flatness.
Route comparison snapshot
Spokane River Run Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 3.8%
- flat grade share
- 59.3%
- lower ascent
- 925 m
- climbing density
- 18.5 m/km
- net elevation
- 0 m
- maximum grade
- 25.9%
Spokane River Run 25K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 2.3% Favoured
- flat grade share
- 63.0% Favoured
- lower ascent
- 326 m
- climbing density
- 13.1 m/km
- net elevation
- 0 m
- maximum grade
- 21.0%
| Metric | Spokane River Run Ultramarathon | Spokane River Run 25K |
|---|---|---|
| Flat grade share | 59.3% | 63.0% ✓ |
| GAP factor (% slower than flat) | 3.8% | 2.3% ✓ |
| Uphill share | 19.6% | 18.1% |
| Steep-up share | 9.4% | 6.7% |
| Downhill share | 21.1% | 18.9% |
| Total ascent (m) | 925 m | 326 m |
| Climbing density (m/km) | 18.5 m/km | 13.1 m/km |
| Longest climb length (m) | 1,170 m | 1,610 m |
| Longest climb gain (m) | 89 m | 80 m |
| Longest climb average grade | 7.6% | 5.0% |
| Total descent (m) | 925 m | 326 m |
| Net elevation (m) | 0 m | 0 m |
| Max absolute grade | 25.9% | 21.0% |
| Start elevation (m) | 505 m | 505 m |
| Finish elevation (m) | 505 m | 505 m |
| Scenic score | 100/100 | 100/100 |
| Conditions | 93/100 | 93/100 |
GAP factor (% slower than flat)
- Spokane River Run 25K
- 2.3% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Spokane River Run Ultramarathon
- 18.5 m/km
- Spokane River Run 25K
- 13.1 m/km
Longest climb length (m)
- Spokane River Run 25K
- 1,610 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
- Spokane River Run 25K
- 100/100
Conditions
- Spokane River Run 25K
- 93/100
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 | Spokane River Run Ultramarathon | Spokane River Run 25K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2027-04-18 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2027-04-18 (legacy event-level date). |
| Location | Nine Mile Falls, Washington | Nine Mile Falls, Washington |
| Actual distance | 50 km | 25 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Point To Point | Point To Point |
| Surface | 100% unpaved trail primarily single Track with some wider paths | 100% unpaved trail primarily single Track with some wider paths |
| Elevation character | Hilly | Hilly |
| Terrain | Trail | Trail |
| Scenery | Parkland, Riverside, City, Countryside, Forest, Coastal, Canyon | Parkland, Riverside, City, Countryside, Forest, Coastal, Canyon |
| Atmosphere | Community, Charity, Scenic Tour | Community, Charity, Scenic Tour |
| Technicality | Technical | Moderate |
| Total ascent | 925 m | 326 m |
| Climbing density | 18.5 m/km | 13.1 m/km |
| Total descent | 925 m | 326 m |
| Net elevation | 0 m | 0 m |
| Max absolute grade | 25.9% | 21.0% |
| Flat grade share | 59.3% | 63.0% |
| GAP factor | 3.8% | 2.3% |
| Cutoff | 4:00:00 | Unavailable |
| Entry model | Open | Open |
Schedule
- Spokane River Run Ultramarathon
Exact race date not confirmed. Event weekend starts 2027-04-18 (legacy event-level date).
- Spokane River Run 25K
Exact race date not confirmed. Event weekend starts 2027-04-18 (legacy event-level date).
Location
- Spokane River Run Ultramarathon
- Nine Mile Falls, Washington
- Spokane River Run 25K
- Nine Mile Falls, Washington
Actual distance
- Spokane River Run Ultramarathon
- 50 km
- Spokane River Run 25K
- 25 km
raceindex.org mapped route held
- Spokane River Run Ultramarathon
- Held
- Spokane River Run 25K
- Held
raceindex.org elevation profile held
- Spokane River Run Ultramarathon
- Held
- Spokane River Run 25K
- Held
Course type
- Spokane River Run Ultramarathon
- Point To Point
- Spokane River Run 25K
- Point To Point
Surface
- Spokane River Run Ultramarathon
- 100% unpaved trail primarily single Track with some wider paths
- Spokane River Run 25K
- 100% unpaved trail primarily single Track with some wider paths
Elevation character
- Spokane River Run Ultramarathon
- Hilly
- Spokane River Run 25K
- Hilly
Terrain
- Spokane River Run Ultramarathon
- Trail
- Spokane River Run 25K
- Trail
Scenery
- Spokane River Run Ultramarathon
- Parkland, Riverside, City, Countryside, Forest, Coastal, Canyon
- Spokane River Run 25K
- Parkland, Riverside, City, Countryside, Forest, Coastal, Canyon
Atmosphere
- Spokane River Run Ultramarathon
- Community, Charity, Scenic Tour
- Spokane River Run 25K
- Community, Charity, Scenic Tour
Technicality
- Spokane River Run Ultramarathon
- Technical
- Spokane River Run 25K
- Moderate
Total ascent
- Spokane River Run Ultramarathon
- 925 m
- Spokane River Run 25K
- 326 m
Climbing density
- Spokane River Run Ultramarathon
- 18.5 m/km
- Spokane River Run 25K
- 13.1 m/km
Total descent
- Spokane River Run Ultramarathon
- 925 m
- Spokane River Run 25K
- 326 m
Net elevation
- Spokane River Run Ultramarathon
- 0 m
- Spokane River Run 25K
- 0 m
Max absolute grade
- Spokane River Run Ultramarathon
- 25.9%
- Spokane River Run 25K
- 21.0%
Flat grade share
- Spokane River Run Ultramarathon
- 59.3%
- Spokane River Run 25K
- 63.0%
GAP factor
- Spokane River Run Ultramarathon
- 3.8%
- Spokane River Run 25K
- 2.3%
Cutoff
- Spokane River Run Ultramarathon
- 4:00:00
- Spokane River Run 25K
- Unavailable
Entry model
- Spokane River Run Ultramarathon
- Open
- Spokane River Run 25K
- 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, Spokane River Run Ultramarathon or Spokane River Run 25K?
Spokane River Run 25K has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.