Flat grade share
- Catalina Island Marathon
- 19.7% Favoured
Catalina Island Marathon vs Catalina Island Marathon 10K
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofCatalina Island Marathon or Catalina Island Marathon 10K — which comes out ahead?
Catalina Island Marathon has the stronger available profile on flat grade share and course flatness.
Route comparison snapshot
Catalina Island Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 11.8% Favoured
- flat grade share
- 19.7% Favoured
- lower ascent
- 1,530 m
- climbing density
- 36.3 m/km
- net elevation
- 4 m
- maximum grade
- 44.6%
Catalina Island Marathon 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 13.2%
- flat grade share
- 16.5%
- lower ascent
- 398 m
- climbing density
- 39.8 m/km
- net elevation
- 0 m
- maximum grade
- 39.0%
| Metric | Catalina Island Marathon | Catalina Island Marathon 10K |
|---|---|---|
| Flat grade share | 19.7% ✓ | 16.5% |
| GAP factor (% slower than flat) | 11.8% ✓ | 13.2% |
| Uphill share | 41.5% | 40.1% |
| Steep-up share | 25.8% | 25.3% |
| Downhill share | 38.8% | 43.4% |
| Total ascent (m) | 1,530 m | 398 m |
| Climbing density (m/km) | 36.3 m/km | 39.8 m/km |
| Longest climb length (m) | 810 m | 2,270 m |
| Longest climb gain (m) | 83 m | 134 m |
| Longest climb average grade | 10.2% | 5.9% |
| Total descent (m) | 1,526 m | 398 m |
| Net elevation (m) | 4 m | 0 m |
| Max absolute grade | 44.6% | 39.0% |
| Start elevation (m) | 6 m | 9 m |
| Finish elevation (m) | 10 m | 9 m |
| Scenic score | 100/100 | 100/100 |
| Conditions | 75/100 | 75/100 |
GAP factor (% slower than flat)
- Catalina Island Marathon
- 11.8% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
- Catalina Island Marathon
- 1,530 m
Climbing density (m/km)
- Catalina Island Marathon
- 36.3 m/km
- Catalina Island Marathon 10K
- 39.8 m/km
Longest climb length (m)
- Catalina Island Marathon 10K
- 2,270 m
Longest climb gain (m)
Longest climb average grade
Total descent (m)
- Catalina Island Marathon
- 1,526 m
Net elevation (m)
Max absolute grade
Start elevation (m)
Finish elevation (m)
Scenic score
- Catalina Island Marathon
- 100/100
- Catalina Island Marathon 10K
- 100/100
Conditions
- Catalina Island Marathon
- 75/100
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 | Catalina Island Marathon | Catalina Island Marathon 10K |
|---|---|---|
| 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 | 42.2 km | 10 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Point To Point | Loop |
| Surface | Trail | Unavailable |
| Elevation character | Hilly | Unavailable |
| Terrain | Trail, Road, Gravel | Road |
| Scenery | Coastal, Island, Waterfront, Mountain, Countryside | City, Coastal, Waterfront, Island, Mountain, Countryside |
| Atmosphere | Wilderness, Destination, Scenic Tour | Wilderness, Destination, Scenic Tour |
| Technicality | Moderate | Unavailable |
| Total ascent | 1,530 m | 398 m |
| Climbing density | 36.3 m/km | 39.8 m/km |
| Total descent | 1,526 m | 398 m |
| Net elevation | 4 m | 0 m |
| Max absolute grade | 44.6% | 39.0% |
| Flat grade share | 19.7% | 16.5% |
| GAP factor | 11.8% | 13.2% |
| Cutoff | 8:00:00 | 3:15:00 |
| Entry model | Open | Open |
Schedule
- Catalina Island Marathon
Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date).
- Catalina Island Marathon 10K
Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date).
Location
- Catalina Island Marathon
- Avalon, California
- Catalina Island Marathon 10K
- Avalon, California
Actual distance
- Catalina Island Marathon
- 42.2 km
- Catalina Island Marathon 10K
- 10 km
raceindex.org mapped route held
- Catalina Island Marathon
- Held
- Catalina Island Marathon 10K
- Held
raceindex.org elevation profile held
- Catalina Island Marathon
- Held
- Catalina Island Marathon 10K
- Held
Course type
- Catalina Island Marathon
- Point To Point
- Catalina Island Marathon 10K
- Loop
Surface
- Catalina Island Marathon
- Trail
- Catalina Island Marathon 10K
- Unavailable
Elevation character
- Catalina Island Marathon
- Hilly
- Catalina Island Marathon 10K
- Unavailable
Terrain
- Catalina Island Marathon
- Trail, Road, Gravel
- Catalina Island Marathon 10K
- Road
Scenery
- Catalina Island Marathon
- Coastal, Island, Waterfront, Mountain, Countryside
- Catalina Island Marathon 10K
- City, Coastal, Waterfront, Island, Mountain, Countryside
Atmosphere
- Catalina Island Marathon
- Wilderness, Destination, Scenic Tour
- Catalina Island Marathon 10K
- Wilderness, Destination, Scenic Tour
Technicality
- Catalina Island Marathon
- Moderate
- Catalina Island Marathon 10K
- Unavailable
Total ascent
- Catalina Island Marathon
- 1,530 m
- Catalina Island Marathon 10K
- 398 m
Climbing density
- Catalina Island Marathon
- 36.3 m/km
- Catalina Island Marathon 10K
- 39.8 m/km
Total descent
- Catalina Island Marathon
- 1,526 m
- Catalina Island Marathon 10K
- 398 m
Net elevation
- Catalina Island Marathon
- 4 m
- Catalina Island Marathon 10K
- 0 m
Max absolute grade
- Catalina Island Marathon
- 44.6%
- Catalina Island Marathon 10K
- 39.0%
Flat grade share
- Catalina Island Marathon
- 19.7%
- Catalina Island Marathon 10K
- 16.5%
GAP factor
- Catalina Island Marathon
- 11.8%
- Catalina Island Marathon 10K
- 13.2%
Cutoff
- Catalina Island Marathon
- 8:00:00
- Catalina Island Marathon 10K
- 3:15:00
Entry model
- Catalina Island Marathon
- Open
- Catalina Island Marathon 10K
- 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 or Catalina Island Marathon 10K?
Catalina Island Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.