Events
Race Directors

12 Hours Ultra Running Events in California

All 50 KM 50 Miles 100 KM 100 Miles 6 Hours 12 Hours 24 Hours

Upcoming Events

Date Event City Distances
06/13/26 SF Half Day San Francisco 6 Hours , 12 Hours
06/19/26 Orange Curtain Cerritos 6 Hours , 12 Hours , 24 Hours , 50 KM , 100 KM
07/24/26 South Bay 24 San Diego 6 Hours , 12 Hours , 12 Hours , 24 Hours
07/25/26 Dirty Dozen and Half Dozen Endurance Run Pinole 6 Hours , 12 Hours
08/08/26 Napa Lapa Napa 6 Hours , 12 Hours
08/08/26 Skyline Wilderness Endurance Trail Run Napa 6 Hours , 12 Hours
09/11/26 Mendocino Running Festival Mendocino 6 Hours , 12 Hours
09/18/26 Mile Madness Endurance Run Auburn 6 Hours , 12 Hours , 24 Hours , 48 Hours , 72 Hours , 100 Miles
10/02/26 Back On The Ranch Trail Run Los Olivos 6 Hours , 12 Hours , 24 Hours , 48 Hours
10/17/26 Cahuilla Rez Ultra Anza 12 Hours , 24 Hours , 100 Miles
10/22/26 Weekend at Burney Burney 12 Hours , 24 Hours , 48 Hours
11/28/26 Boundiful Endurance Runs Hemet 6 Hours , 12 Hours , 24 Hours , 100 Miles
12/31/26 New Year's One Day San Jose 6 Hours , 12 Hours , 24 Hours , 100 Miles
02/12/27 Elevate 12 Hour Race Santa Maria 12 Hours
02/27/27 Will Rogers 24 Hour/12 Hours/6 Hour Pacific Palisades 6 Hours , 12 Hours , 24 Hours , 50 KM , 100 Miles
03/19/27 San Diego Pirate's Cove 6/12/24 Hour Run/Walk Cuyamaca Lake 6 Hours , 12 Hours , 24 Hours
03/27/27 Bad Ass Backyard Ultra Rio Linda Backyard , 12 Hours
04/17/27 Silver Moon Race - Kings River Reedley 6 Hours , 12 Hours , 24 Hours , 100 Miles

Past Events

Date Event City Distances
05/23/26 Nanny Goat Riverside 6 Hours , 12 Hours , 24 Hours , 100 Miles
04/25/26 SoCal Redwood Race Brea 6 Hours , 12 Hours
04/17/26 Run4Kids 24 Hour Running Party Corona 6 Hours , 12 Hours , 24 Hours , 50 Miles , 100 Miles
03/21/26 Monserate Endurance Test Fallbrook 6 Hours , 12 Hours
03/21/26 J Treequinox Joshua Tree 12 Hours
12/13/25 Lunatic Loop 6/12 hour run Ramona 6 Hours , 12 Hours
11/22/25 Captain's Winter Solstice Runaround Modesto 6 Hours , 8 Hours , 12 Hours
10/26/24 REVOLUTION XT ULTRA CHALLENGE Tracy 6 Hours , 12 Hours , 24 Hours
07/13/24 Run 12 Hours - San Diego San Diego 12 Hours
05/04/24 Little Loco Forest Ranch Backyard , 6 Hours , 12 Hours
03/22/24 RUN4Kids 48r Hour Running Party Corona 6 Hours , 12 Hours , 24 Hours , 25 Hours , 48 Hours , 50 Miles , 100 Miles
02/24/24 Silver Moon Race - Paso Robles Paso Robles 6 Hours , 12 Hours , 2 Miles , 24 Hours , 10 KM , 100 Miles
09/23/23 Ride To Walk Endurance Race Lincoln 6 Hours , 12 Hours , 24 Hours , 48 Hours , 72 Hours , 100 Miles
04/29/23 Wandering Idiot Festival Of Hills Elk Creek 6 Hours , 12 Hours , 24 Hours
04/01/23 Cirque du Griffith Park 100-Mile & 6/12/24 Hour Ultra Runs Los Angeles 6 Hours , 12 Hours , 24 Hours , 100 Miles
10/29/22 Atlas Trail Series- Two Trees Challenge Ventura 6 Hours , 12 Hours
01/15/22 One Day In Auburn Auburn 6 Hours , 6 Hours , 12 Hours , 12 Hours , 24 Hours , 24 Hours
11/13/21 Day On The Ranch Quincy 6 Hours , 12 Hours , 24 Hours
07/10/21 Sisyphus Ultra Challenge Hemet Backyard , 12 Hours , 24 Hours , 48 Hours , 100 Miles , 200 Miles
08/30/20 DSE Distance Classic San Francisco 6 Hours , 12 Hours
08/01/20 River Park Ultras Lakeside Backyard , 6 Hours , 12 Hours , 24 Hours
01/18/20 Celtic Winter Classic 24 Hour Run Bakersfield 12 Hours , 24 Hours , 50 KM , 50 Miles , 100 Miles
08/17/19 Julian Station Full Moon Run Julian 12 Hours , 24 Hours
06/02/18 San Francisco Summer Solstice San Francisco 6 Hours , 12 Hours , 24 Hours
03/24/18 Montecito Cold Spring School Tuff Benefit Run Santa Barbara 6 Hours , 12 Hours , 24 Hours
10/06/17 Moonlight Mooncake Run San Diego 12 Hours
04/22/17 Razorback Endurance Race San Martin 6 Hours , 12 Hours , 24 Hours , 48 Hours , 72 Hours , 50 KM , 50 Miles , 100 KM , 100 Miles , 125 Miles
03/25/17 Barn Burner Sanger 6 Hours , 12 Hours , 24 Hours
03/18/17 Davis Two Day Davis 12 Hours , 24 Hours , 48 Hours
02/25/17 Riverbank One Day Riverbank 6 Hours , 12 Hours , 24 Hours
12/06/14 Jester's World Record Run Bonita 6 Hours , 12 Hours , 24 Hours , 100 Miles
07/20/13 Rohring Round the Clock - Redux Chula Vista 6 Hours , 12 Hours , 24 Hours , 100 Miles
02/23/13 Rohring Round the Clock Chula Vista 6 Hours , 12 Hours , 24 Hours , 100 Miles
09/24/12 Race Against The Clock San Francisco 12 Hours
08/13/11 Hotter than Hell Cameron Park 6 Hours , 12 Hours
10/23/10 San Francisco One Day San Francisco 12 Hours , 24 Hours
06/12/10 Lake Merritt Half Day Oakland 6 Hours , 12 Hours
12/27/09 Big Cat Challenge Huntington Beach 12 Hours
08/01/09 12 Hours at Cool Cool 12 Hours
05/09/09 Ayala Park Ayala Park 6 Hours , 12 Hours
11/01/05 San Diego 1 Day San Diego 12 Hours , 24 Hours
07/19/03 Jim Skophammer San Mateo 12 Hours , 24 Hours
08/29/98 Greg & Delmar's 12 & 24 Hour Adventure Run Gibson Ranch 12 Hours , 24 Hours
08/01/97 Orange 12 Hour Run Orange 12 Hours
03/18/95 Redwood Empire 12 Hour Run Santa Rosa 12 Hours , 50 KM , 50 Miles

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Haul Ass Ultra Running Festival
Erie, CO - 20 finishers
50 Miles | 50 KM | 12 Hours | 9 Hours | 6 Hours
Summer Sasquatch Trail Runs
Lore City, OH - 26 finishers
50 KM
Rose Canyon Ultra
Herriman, UT - 110 finishers
50 Miles | 50 KM
Vashon Island Ultramarathon & Trail Run
Vashon Island, WA - 32 finishers
50 KM
Run Under The Stars - Paducah
Paducah, KY - 65 finishers
10 Hours
Ridge to Rails 50k, Half, & 10k
Old Fort, NC - 154 finishers
50 KM
Malibu Canyon Trail Races (SAMO 100 Mile...
Malibu, CA - 222 finishers
100 KM | 50 Miles | 50 KM
Huron 100
Grass Lake, MI - 117 finishers
100 Miles | 50 Miles
The Kan
Spokane, WA - 76 finishers
50 KM
Old Dominion
Woodstock, VA - 63 finishers
100 Miles
View All Results