Flat grade share
- La Jolla Half Marathon, 10K & 5K
- 56.0% Favoured
Catalina Island Marathon 10K vs La Jolla Half Marathon, 10K & 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 La Jolla Half Marathon, 10K & 5K — which comes out ahead?
La Jolla Half Marathon, 10K & 5K has the stronger available profile on flat grade share, course flatness and conditions.
Route comparison snapshot
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%
La Jolla Half Marathon, 10K & 5K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- -4.5% Favoured
- flat grade share
- 56.0% Favoured
- lower ascent
- 76 m
- climbing density
- 7.6 m/km
- net elevation
- -121 m
- maximum grade
- 12.4%
| Metric | Catalina Island Marathon 10K | La Jolla Half Marathon, 10K & 5K |
|---|---|---|
| Flat grade share | 16.5% | 56.0% ✓ |
| GAP factor (% slower than flat) | 13.2% | -4.5% ✓ |
| Uphill share | 40.1% | 11.3% |
| Steep-up share | 25.3% | 1.8% |
| Downhill share | 43.4% | 32.6% |
| Total ascent (m) | 398 m | 76 m |
| Climbing density (m/km) | 39.8 m/km | 7.6 m/km |
| Longest climb length (m) | 2,270 m | 630 m |
| Longest climb gain (m) | 134 m | 25 m |
| Longest climb average grade | 5.9% | 4.0% |
| Total descent (m) | 398 m | 197 m |
| Net elevation (m) | 0 m | -121 m |
| Max absolute grade | 39.0% | 12.4% |
| Start elevation (m) | 9 m | 132 m |
| Finish elevation (m) | 9 m | 10 m |
| Scenic score | 100/100 ✓ | 73/100 |
| Conditions | 75/100 | 76/100 ✓ |
GAP factor (% slower than flat)
- La Jolla Half Marathon, 10K & 5K
- -4.5% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Catalina Island Marathon 10K
- 39.8 m/km
- La Jolla Half Marathon, 10K & 5K
- 7.6 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
- La Jolla Half Marathon, 10K & 5K
- 76/100 Favoured
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.
Race facts that change the decision
| Fact | Catalina Island Marathon 10K | La Jolla Half Marathon, 10K & 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 2027-05-15 (legacy event-level date). |
| Location | Avalon, California | La Jolla, San Diego, California |
| Actual distance | 10 km | 10 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Loop | Unavailable |
| Elevation character | Unavailable | Net Downhill |
| Terrain | Road | Road |
| Scenery | City, Coastal, Waterfront, Island, Mountain, Countryside | Forest, Coastal, Waterfront, Parkland, City |
| Atmosphere | Wilderness, Destination, Scenic Tour | Scenic Tour, Destination, Competitive |
| Total ascent | 398 m | 76 m |
| Climbing density | 39.8 m/km | 7.6 m/km |
| Total descent | 398 m | 197 m |
| Net elevation | 0 m | -121 m |
| Max absolute grade | 39.0% | 12.4% |
| Flat grade share | 16.5% | 56.0% |
| GAP factor | 13.2% | -4.5% |
| Cutoff | 3:15:00 | Unavailable |
| Entry model | Open | Open |
Schedule
- Catalina Island Marathon 10K
Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date).
- La Jolla Half Marathon, 10K & 5K
Exact race date not confirmed. Event weekend starts 2027-05-15 (legacy event-level date).
Location
- Catalina Island Marathon 10K
- Avalon, California
- La Jolla Half Marathon, 10K & 5K
- La Jolla, San Diego, California
Actual distance
- Catalina Island Marathon 10K
- 10 km
- La Jolla Half Marathon, 10K & 5K
- 10 km
raceindex.org mapped route held
- Catalina Island Marathon 10K
- Held
- La Jolla Half Marathon, 10K & 5K
- Held
raceindex.org elevation profile held
- Catalina Island Marathon 10K
- Held
- La Jolla Half Marathon, 10K & 5K
- Held
Course type
- Catalina Island Marathon 10K
- Loop
- La Jolla Half Marathon, 10K & 5K
- Unavailable
Elevation character
- Catalina Island Marathon 10K
- Unavailable
- La Jolla Half Marathon, 10K & 5K
- Net Downhill
Terrain
- Catalina Island Marathon 10K
- Road
- La Jolla Half Marathon, 10K & 5K
- Road
Scenery
- Catalina Island Marathon 10K
- City, Coastal, Waterfront, Island, Mountain, Countryside
- La Jolla Half Marathon, 10K & 5K
- Forest, Coastal, Waterfront, Parkland, City
Atmosphere
- Catalina Island Marathon 10K
- Wilderness, Destination, Scenic Tour
- La Jolla Half Marathon, 10K & 5K
- Scenic Tour, Destination, Competitive
Total ascent
- Catalina Island Marathon 10K
- 398 m
- La Jolla Half Marathon, 10K & 5K
- 76 m
Climbing density
- Catalina Island Marathon 10K
- 39.8 m/km
- La Jolla Half Marathon, 10K & 5K
- 7.6 m/km
Total descent
- Catalina Island Marathon 10K
- 398 m
- La Jolla Half Marathon, 10K & 5K
- 197 m
Net elevation
- Catalina Island Marathon 10K
- 0 m
- La Jolla Half Marathon, 10K & 5K
- -121 m
Max absolute grade
- Catalina Island Marathon 10K
- 39.0%
- La Jolla Half Marathon, 10K & 5K
- 12.4%
Flat grade share
- Catalina Island Marathon 10K
- 16.5%
- La Jolla Half Marathon, 10K & 5K
- 56.0%
GAP factor
- Catalina Island Marathon 10K
- 13.2%
- La Jolla Half Marathon, 10K & 5K
- -4.5%
Cutoff
- Catalina Island Marathon 10K
- 3:15:00
- La Jolla Half Marathon, 10K & 5K
- Unavailable
Entry model
- Catalina Island Marathon 10K
- Open
- La Jolla Half Marathon, 10K & 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 La Jolla Half Marathon, 10K & 5K?
La Jolla Half Marathon, 10K & 5K has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.