30Jan
100K
Running
- Distance
- 100K
- Start time
- 05:30
- Entry fee
- $300.00
Sean OBrien 100K/50M/50K/26.2/30K
Calabasas,
California,
United States
89 days left
ultrasignup.com
Sean OBrien 100K/50M/50K/26.2/30K
About the event
The 100k is a 2027 WS100 qualifier. Distances being offered are 100k, 50 mile, 50k, Marathon, and 30k. Let's kick off 2027 with an epic race through the Santa Monica Mountains! Thirteen years running and Sean O'Brien still brings some of the best and most challenging trail running in Southern California. We can't wait to have you all on the trails to celebrate with a great day of running.
Races offered
30Jan
50 Miler
Running
- Distance
- 80.5K
- Start time
- 06:00
- Entry fee
- $250.00
30Jan
26.2
Running
- Distance
- 26.2
- Start time
- 07:00
- Entry fee
- $155.00
30Jan
30K
Running
- Distance
- 30K
- Start time
- 07:00
- Entry fee
- $140.00
30Jan
50K
Running
- Distance
- 50K
- Start time
- 07:00
- Entry fee
- $185.00
Weather history
3-year monthly averages for January in Calabasas.
Temperature7.9° / 16.2°
Feels like4.6° / 13.5°
Sunshine hours8h 18m
Rainfall3.7 mm
Snowfall—
Wind8.9 km/h (Light breeze)
Humidity62.0%
Max UV indexLow (2.0)
Sweat lossLow
Course conditionsFirm and slightly soft
Sunrise07:57
Sunset18:09
About Calabasas
Learn more about the host city, Calabasas.
Calabasas is a city in Los Angeles County, California, United States. It is adjacent to the southwestern San Fernando Valley neighborhoods of Los Angeles. Situated within the foothills of the Santa Monica and Santa Susana mountains, 29.9 miles (48.1 km) northwest of downtown Los Angeles, Calabasas has a population of 22,491.
Read moreHotels & places to stay
Things to do nearby
Tours and activities near Calabasas, powered by Viator.
Race results
All-time top performances and historical records for Sean OBrien 100K/50M/50K/26.2/30K.
| Place | Name | Year | Time |
|---|---|---|---|
| 🥇 | Christopher Wehan | '17 | 8:24:35 |
| 🥈 | Ryan Kaiser | '17 | 8:30:01 |
| 🥉 | Ryan Smith | '15 | 8:41:41 |
| 4 | Florian Neuschwander | '18 | 8:48:04 |
| 5 | Bob Shebest | '17 | 8:49:02 |
| 6 | Seth Swanson | '15 | 8:57:06 |
| 7 | Bradley Revenis | '17 | 9:00:47 |
| 8 | Ben Eysenbach | '23 | 9:02:03 |
| 9 | Brett Hornig | '17 | 9:04:59 |
| 10 | Charlie Ware | '18 | 9:06:54 |
| Place | Name | Year | Time |
|---|---|---|---|
| 🥇 | Courtney Dauwalter | '18 | 9:38:17 |
| 🥈 | Magdalena Boulet | '15 | 9:51:27 |
| 🥉 | Emily Torrence | '17 | 9:56:15 |
| 4 | Kate Elliott | '18 | 10:15:10 |
| 5 | Sabrina Stanley | '17 | 10:19:55 |
| 6 | Devon Yanko | '16 | 10:27:02 |
| 7 | Taylor Nowlin | '18 | 10:34:04 |
| 8 | Anita Ortiz | '15 | 10:40:58 |
| 9 | Amelia Boone | '16 | 10:42:11 |
| 10 | Janessa Taylor | '17 | 10:48:06 |
Runner reviews
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