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

About the Event

Running enthusiasts will find the upcoming WS100 Qualifier Race an exhilarating challenge. Set for 2026, this event offers a range of distances to cater to various skill levels and endurance goals. Participants can choose from the grueling 100k distance, which serves as a direct qualifier for the renowned WS100 race, or opt for shorter yet still demanding routes such as the 50-mile trek, the 50k journey, the marathon length, and the more accessible but no less challenging 30k run. Each course is designed to test runners' limits while providing a rewarding experience amidst breathtaking landscapes and supportive community vibes. Whether you're aiming for qualification or simply looking to push your personal boundaries, this race offers an array of options that promise both challenge and camaraderie.
The event's diverse distance offerings make it appealing to athletes with varying backgrounds and training levels, ensuring there is a suitable option for everyone from seasoned ultrarunners to those new to the sport. As runners traverse through the terrain, they will encounter varied elevations, showcasing both technical trails and serene stretches that highlight natural beauty. This race not only serves as an opportunity for personal achievement but also fosters a sense of community among participants who share a passion for endurance running.
With its focus on qualifying athletes for larger events like WS100 while providing standalone challenges within the event itself, this qualifier is set to be a highlight in the 2026 race calendar.

Races Offered

100K

Jan 30, 2027

straighten

Distance — 100K

terrain

Type — Running

timer

05:30

sell

$300.00

50 Miler

Jan 30, 2027

straighten

Distance — 80.5K

terrain

Type — Running

timer

06:00

sell

$250.00

26.2

Jan 30, 2027

straighten

Distance — 26.2

terrain

Type — Running

timer

07:00

sell

$155.00

30K

Jan 30, 2027

straighten

Distance — 30K

terrain

Type — Running

timer

07:00

sell

$140.00

50K

Jan 30, 2027

straighten

Distance — 50K

terrain

Type — Running

timer

07:00

sell

$185.00

Weather History

These values represent the 3-year monthly averages for January in Calabasas.

thermostat Temperature

7.1° / 16.9°

wb_sunny Feels like

3.7° / 13.6°

light_mode Avg sunshine hours

8h 18m

water_drop Avg rainfall

4.2 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.3 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Low (2.0)

humidity_mid Humidity

60.3%

wb_twilight Sunrise

07:57

nightlight Sunset

18:08

About Calabasas

Learn more about the host city, Calabasas.

Calabasas is a suburban community at the southwestern corner of the San Fernando Valley of Los Angeles County, sitting in the foothills of the Santa Monica Mountains to the south.

Hotels & Places to Stay

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