Running Trail running

Sean OBrien 100K/50M/50K/26.2/30K

Name: Sean OBrien 100K/50M/50K/26.2/30K
Start: 2027-01-30
End: 2027-01-30
Location: Calabasas

Calabasas, California, United States

Saturday, 30 Jan 2027 89 days left

ultrasignup.com

Date 30 Jan, 2027

Races 5 distances

Entry fee $140.00 – $300.00

Runner rating Be the first to rate

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

100K

Running

Distance: 100K
Start time: 05:30
Entry fee: $300.00

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.

Things to do nearby

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Race results

All-time top performances and historical records for Sean OBrien 100K/50M/50K/26.2/30K.

Place	Name	Gender	Age	Year	City	Time
🥇	Christopher Wehan	M	35	'17	—	8:24:35
🥈	Ryan Kaiser	M	38	'17	—	8:30:01
🥉	Ryan Smith	M	35	'15	—	8:41:41
4	Florian Neuschwander	M	36	'18	—	8:48:04
5	Bob Shebest	M	42	'17	—	8:49:02
6	Seth Swanson	M	35	'15	—	8:57:06
7	Bradley Revenis	M	30	'17	—	9:00:47
8	Ben Eysenbach	M	27	'23	—	9:02:03
9	Brett Hornig	M	25	'17	—	9:04:59
10	Charlie Ware	M	32	'18	—	9:06:54

Place	Name	Gender	Age	Year	City	Time
🥇	Courtney Dauwalter	F	32	'18	—	9:38:17
🥈	Magdalena Boulet	F	41	'15	—	9:51:27
🥉	Emily Torrence	F	30	'17	—	9:56:15
4	Kate Elliott	F	31	'18	—	10:15:10
5	Sabrina Stanley	F	27	'17	—	10:19:55
6	Devon Yanko	F	33	'16	—	10:27:02
7	Taylor Nowlin	F	27	'18	—	10:34:04
8	Anita Ortiz	F	50	'15	—	10:40:58
9	Amelia Boone	F	32	'16	—	10:42:11
10	Janessa Taylor	F	38	'17	—	10:48:06

Runner reviews

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