Flat grade share
- La Jolla Half Marathon, 10K & 5K
- 56.0% Favoured
La Jolla Half Marathon, 10K & 5K 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 ofLa Jolla Half Marathon, 10K & 5K or Catalina Island Marathon 10K — 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
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%
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 | La Jolla Half Marathon, 10K & 5K | Catalina Island Marathon 10K |
|---|---|---|
| Flat grade share | 56.0% ✓ | 16.5% |
| GAP factor (% slower than flat) | -4.5% ✓ | 13.2% |
| Uphill share | 11.3% | 40.1% |
| Steep-up share | 1.8% | 25.3% |
| Downhill share | 32.6% | 43.4% |
| Total ascent (m) | 76 m | 398 m |
| Climbing density (m/km) | 7.6 m/km | 39.8 m/km |
| Longest climb length (m) | 630 m | 2,270 m |
| Longest climb gain (m) | 25 m | 134 m |
| Longest climb average grade | 4.0% | 5.9% |
| Total descent (m) | 197 m | 398 m |
| Net elevation (m) | -121 m | 0 m |
| Max absolute grade | 12.4% | 39.0% |
| Start elevation (m) | 132 m | 9 m |
| Finish elevation (m) | 10 m | 9 m |
| Scenic score | 73/100 | 100/100 ✓ |
| Conditions | 76/100 ✓ | 75/100 |
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)
- La Jolla Half Marathon, 10K & 5K
- 7.6 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)
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 | La Jolla Half Marathon, 10K & 5K | Catalina Island Marathon 10K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2027-05-15 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date). |
| Location | La Jolla, San Diego, California | Avalon, California |
| Actual distance | 10 km | 10 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Unavailable | Loop |
| Elevation character | Net Downhill | Unavailable |
| Terrain | Road | Road |
| Scenery | Forest, Coastal, Waterfront, Parkland, City | City, Coastal, Waterfront, Island, Mountain, Countryside |
| Atmosphere | Scenic Tour, Destination, Competitive | Wilderness, Destination, Scenic Tour |
| Total ascent | 76 m | 398 m |
| Climbing density | 7.6 m/km | 39.8 m/km |
| Total descent | 197 m | 398 m |
| Net elevation | -121 m | 0 m |
| Max absolute grade | 12.4% | 39.0% |
| Flat grade share | 56.0% | 16.5% |
| GAP factor | -4.5% | 13.2% |
| Cutoff | Unavailable | 3:15:00 |
| Entry model | Open | Open |
Schedule
- La Jolla Half Marathon, 10K & 5K
Exact race date not confirmed. Event weekend starts 2027-05-15 (legacy event-level date).
- Catalina Island Marathon 10K
Exact race date not confirmed. Event weekend starts 2027-03-13 (legacy event-level date).
Location
- La Jolla Half Marathon, 10K & 5K
- La Jolla, San Diego, California
- Catalina Island Marathon 10K
- Avalon, California
Actual distance
- La Jolla Half Marathon, 10K & 5K
- 10 km
- Catalina Island Marathon 10K
- 10 km
raceindex.org mapped route held
- La Jolla Half Marathon, 10K & 5K
- Held
- Catalina Island Marathon 10K
- Held
raceindex.org elevation profile held
- La Jolla Half Marathon, 10K & 5K
- Held
- Catalina Island Marathon 10K
- Held
Course type
- La Jolla Half Marathon, 10K & 5K
- Unavailable
- Catalina Island Marathon 10K
- Loop
Elevation character
- La Jolla Half Marathon, 10K & 5K
- Net Downhill
- Catalina Island Marathon 10K
- Unavailable
Terrain
- La Jolla Half Marathon, 10K & 5K
- Road
- Catalina Island Marathon 10K
- Road
Scenery
- La Jolla Half Marathon, 10K & 5K
- Forest, Coastal, Waterfront, Parkland, City
- Catalina Island Marathon 10K
- City, Coastal, Waterfront, Island, Mountain, Countryside
Atmosphere
- La Jolla Half Marathon, 10K & 5K
- Scenic Tour, Destination, Competitive
- Catalina Island Marathon 10K
- Wilderness, Destination, Scenic Tour
Total ascent
- La Jolla Half Marathon, 10K & 5K
- 76 m
- Catalina Island Marathon 10K
- 398 m
Climbing density
- La Jolla Half Marathon, 10K & 5K
- 7.6 m/km
- Catalina Island Marathon 10K
- 39.8 m/km
Total descent
- La Jolla Half Marathon, 10K & 5K
- 197 m
- Catalina Island Marathon 10K
- 398 m
Net elevation
- La Jolla Half Marathon, 10K & 5K
- -121 m
- Catalina Island Marathon 10K
- 0 m
Max absolute grade
- La Jolla Half Marathon, 10K & 5K
- 12.4%
- Catalina Island Marathon 10K
- 39.0%
Flat grade share
- La Jolla Half Marathon, 10K & 5K
- 56.0%
- Catalina Island Marathon 10K
- 16.5%
GAP factor
- La Jolla Half Marathon, 10K & 5K
- -4.5%
- Catalina Island Marathon 10K
- 13.2%
Cutoff
- La Jolla Half Marathon, 10K & 5K
- Unavailable
- Catalina Island Marathon 10K
- 3:15:00
Entry model
- La Jolla Half Marathon, 10K & 5K
- 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, La Jolla Half Marathon, 10K & 5K or Catalina Island Marathon 10K?
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.