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