Flat grade share
- Catalina Island Marathon 10K
- 16.5% Favoured
Catalina Island Marathon 10K vs Catalina Island Marathon 5K
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofCatalina Island Marathon 10K or Catalina Island Marathon 5K — which comes out ahead?
Catalina Island Marathon 10K has the stronger available profile on flat grade share, course flatness and scenery score.
Route comparison snapshot
Catalina Island Marathon 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 13.2% Favoured
- flat grade share
- 16.5% Favoured
- lower ascent
- 398 m
- climbing density
- 39.8 m/km
- net elevation
- 0 m
- maximum grade
- 39.0%
Catalina Island Marathon 5K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 20.1%
- flat grade share
- 13.9%
- lower ascent
- 254 m
- climbing density
- 50.7 m/km
- net elevation
- 0 m
- maximum grade
- 39.0%
| Metric | Catalina Island Marathon 10K | Catalina Island Marathon 5K |
|---|---|---|
| Flat grade share | 16.5% ✓ | 13.9% |
| GAP factor (% slower than flat) | 13.2% ✓ | 20.1% |
| Uphill share | 40.1% | 42.4% |
| Steep-up share | 25.3% | 28.7% |
| Downhill share | 43.4% | 43.8% |
| Total ascent (m) | 398 m | 254 m |
| Climbing density (m/km) | 39.8 m/km | 50.7 m/km |
| Longest climb length (m) | 2,270 m | 440 m |
| Longest climb gain (m) | 134 m | 81 m |
| Longest climb average grade | 5.9% | 18.3% |
| Total descent (m) | 398 m | 254 m |
| Net elevation (m) | 0 m | 0 m |
| Max absolute grade | 39.0% | 39.0% |
| Start elevation (m) | 9 m | 9 m |
| Finish elevation (m) | 9 m | 9 m |
| Scenic score | 100/100 ✓ | 95/100 |
| Conditions | 75/100 | 75/100 |
GAP factor (% slower than flat)
- Catalina Island Marathon 10K
- 13.2% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Catalina Island Marathon 10K
- 39.8 m/km
- Catalina Island Marathon 5K
- 50.7 m/km
Longest climb length (m)
- Catalina Island Marathon 10K
- 2,270 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
- Catalina Island Marathon 10K
- 100/100 Favoured
Conditions
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 | Catalina Island Marathon 10K | Catalina Island Marathon 5K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date). |
| Location | Avalon, California | Avalon, California |
| Actual distance | 10 km | 5 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Loop | Unavailable |
| Terrain | Road | Unavailable |
| Scenery | City, Coastal, Waterfront, Island, Mountain, Countryside | Coastal, Waterfront, Island, Mountain, Countryside |
| Atmosphere | Wilderness, Destination, Scenic Tour | Wilderness, Destination, Scenic Tour |
| Total ascent | 398 m | 254 m |
| Climbing density | 39.8 m/km | 50.7 m/km |
| Total descent | 398 m | 254 m |
| Net elevation | 0 m | 0 m |
| Max absolute grade | 39.0% | 39.0% |
| Flat grade share | 16.5% | 13.9% |
| GAP factor | 13.2% | 20.1% |
| Cutoff | 3:15:00 | 2:00:00 |
| Entry model | Open | Open |
Schedule
- Catalina Island Marathon 10K
Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date).
- Catalina Island Marathon 5K
Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date).
Location
- Catalina Island Marathon 10K
- Avalon, California
- Catalina Island Marathon 5K
- Avalon, California
Actual distance
- Catalina Island Marathon 10K
- 10 km
- Catalina Island Marathon 5K
- 5 km
raceindex.org mapped route held
- Catalina Island Marathon 10K
- Held
- Catalina Island Marathon 5K
- Held
raceindex.org elevation profile held
- Catalina Island Marathon 10K
- Held
- Catalina Island Marathon 5K
- Held
Course type
- Catalina Island Marathon 10K
- Loop
- Catalina Island Marathon 5K
- Unavailable
Terrain
- Catalina Island Marathon 10K
- Road
- Catalina Island Marathon 5K
- Unavailable
Scenery
- Catalina Island Marathon 10K
- City, Coastal, Waterfront, Island, Mountain, Countryside
- Catalina Island Marathon 5K
- Coastal, Waterfront, Island, Mountain, Countryside
Atmosphere
- Catalina Island Marathon 10K
- Wilderness, Destination, Scenic Tour
- Catalina Island Marathon 5K
- Wilderness, Destination, Scenic Tour
Total ascent
- Catalina Island Marathon 10K
- 398 m
- Catalina Island Marathon 5K
- 254 m
Climbing density
- Catalina Island Marathon 10K
- 39.8 m/km
- Catalina Island Marathon 5K
- 50.7 m/km
Total descent
- Catalina Island Marathon 10K
- 398 m
- Catalina Island Marathon 5K
- 254 m
Net elevation
- Catalina Island Marathon 10K
- 0 m
- Catalina Island Marathon 5K
- 0 m
Max absolute grade
- Catalina Island Marathon 10K
- 39.0%
- Catalina Island Marathon 5K
- 39.0%
Flat grade share
- Catalina Island Marathon 10K
- 16.5%
- Catalina Island Marathon 5K
- 13.9%
GAP factor
- Catalina Island Marathon 10K
- 13.2%
- Catalina Island Marathon 5K
- 20.1%
Cutoff
- Catalina Island Marathon 10K
- 3:15:00
- Catalina Island Marathon 5K
- 2:00:00
Entry model
- Catalina Island Marathon 10K
- Open
- Catalina Island 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, Catalina Island Marathon 10K or Catalina Island Marathon 5K?
Catalina Island Marathon 10K has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.