Events
Race Directors

100 Miles 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
09/18/26 Mile Madness Endurance Run Auburn 6 Hours , 12 Hours , 24 Hours , 48 Hours , 72 Hours , 100 Miles
10/03/26 Angeles Crest Wrightwood 100 Miles
10/09/26 Kodiak Ultra Marathons Big Bear Lake 50 KM , 100 KM , 100 Miles
10/17/26 Sonoma Fall Classic Healdsburg 50 Miles , 100 Miles
10/17/26 Cahuilla Rez Ultra Anza 12 Hours , 24 Hours , 100 Miles
10/24/26 Island View Endurance Run Goleta 50 KM , 100 KM , 100 Miles
10/28/26 Machete Trail Madness 100 Miler Perris 50 Miles , 100 Miles , 200 Miles
11/07/26 Rio Del Lago Granite Bay 50 KM , 100 Miles
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
02/27/27 Will Rogers 24 Hour/12 Hours/6 Hour Pacific Palisades 6 Hours , 12 Hours , 24 Hours , 50 KM , 100 Miles
04/17/27 Leona Divide Lake Hughes 50 KM , 50 Miles , 100 KM , 100 Miles
04/17/27 Silver Moon Race - Kings River Reedley 6 Hours , 12 Hours , 24 Hours , 100 Miles
04/30/27 Coyote Two Moon Ojai 55 KM , 55 Miles , 100 KM , 100 Miles
04/30/27 San Diego 100 Lake Cuyamaca 100 Miles
05/12/27 Born to Run Ultra Marathons Los Olivos 72 Hours , 96 Hours , 100 Miles
06/12/27 Bay Area 100 Oakland 100 Miles
06/18/27 Burney Mountain 100 Burney 100 Miles

Past Events

Date Event City Distances
06/27/26 Western States 100 Olympic Valley 100 Miles , 100 Miles
06/13/26 Cool Moon Trail Runs Cool 6 Hours , 12 Hours , 50 Miles , 100 KM , 100 Miles
06/06/26 Malibu Canyon Trail Races (SAMO 100 Mile) Malibu 50 KM , 50 Miles , 100 KM , 100 Miles
05/23/26 Nanny Goat Riverside 6 Hours , 12 Hours , 24 Hours , 100 Miles
04/17/26 Run4Kids 24 Hour Running Party Corona 6 Hours , 12 Hours , 24 Hours , 50 Miles , 100 Miles
08/29/25 Run-de-Vous San Martin 14 Hours , 50 KM , 50 Miles , 100 KM , 100 Miles , 126 Miles
08/01/25 Folsom 100 Granite Bay 54 Miles , 100 Miles
04/05/25 Beyond Limits Ultra Mountain Center 24 Hours , 48 Hours , 72 Hours , 50 KM , 50 Miles , 100 Miles , 200 Miles
08/10/24 Headlands Sausalito 50 Miles , 100 KM , 75 Miles , 100 Miles , 150 Miles
08/03/24 Kirkwood's Ultras Kirkwood 50 KM , 46 Miles , 50 Miles , 100 KM , 100 Miles
07/06/24 SISU 24 Monrovia 24 Hours , 100 Miles
06/01/24 The Loco Go Big or Go Home Challenge Forest Ranch 50 KM , 100 KM , 100 Miles
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
09/30/23 Saddle2Surf 100/50 Norco 50 Miles , 100 Miles
09/23/23 Ride To Walk Endurance Race Lincoln 6 Hours , 12 Hours , 24 Hours , 48 Hours , 72 Hours , 100 Miles
05/20/23 San Francisco 50/50 Rodeo Beach 50 KM , 50 Miles , 100 Miles
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
11/19/22 Best Runner (Best of San Diego ) San Diego 50 KM , 50 Miles , 100 KM , 120 KM , 140 KM , 100 Miles
10/08/22 Ultra Trails Lake Tahoe Lake Tahoe 50 KM , 50 Miles , 100 KM , 100 Miles
07/10/21 Sisyphus Ultra Challenge Hemet Backyard , 12 Hours , 24 Hours , 48 Hours , 100 Miles , 200 Miles
11/21/20 Chimera Cleveland National Forest 40 Miles , 100 KM , 100 KM , 100 Miles , 100 Miles
10/31/20 C2M OJAI 100 Miles
09/26/20 HIGHLANDER 100 - There can be only 1 Mount Baldy 50 KM , 60 Miles , 100 Miles
05/09/20 Baldy Marathons Mount Baldy Ski Lodge 50 KM , 40 Miles , 100 KM , 100 Miles
01/18/20 Celtic Winter Classic 24 Hour Run Bakersfield 12 Hours , 24 Hours , 50 KM , 50 Miles , 100 Miles
10/12/19 Santa Barbara 100 Santa Barbara 50 KM , 50 Miles , 100 KM , 100 Miles
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
01/09/16 Long Beach Enlightened Ultra Long Beach 50 KM , 50 Miles , 100 KM , 100 Miles
10/17/15 100 Mile Endurance Challenge Corona 50 Miles , 100 Miles , 103.25 Miles
10/10/15 Joshua Tree Ultra Joshua Tree 50 KM , 50 Miles , 100 KM , 100 Miles
05/02/15 Nirvana Ultra Big Bear Big Bear 50 KM , 50 Miles , 100 KM , 100 Miles
12/26/14 The Volunteer Run : FBO the Ultra Medical Team Bonita 50 KM , 50 Miles , 100 Miles
12/06/14 Jester's World Record Run Bonita 6 Hours , 12 Hours , 24 Hours , 100 Miles
11/23/13 Run d'Amore San Martin Unknown Miles , 50 KM , 50 Miles , 100 KM , 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
02/18/12 Rocky Road Coto de Caza 50 Miles , 100 Miles
06/19/10 Angel Island Tiburon 50 KM , 100 Miles
09/19/09 The Delaware 100 Miles
12/15/84 Death Valley 100 Mile Scotty's Castle 100 Miles
05/19/84 Panther Gap 100 Mile Ferndale 100 Miles
10/10/81 California RoadRunner 100 Mile Endurance Run Cupertino 100 Miles

Weekly Newsletter

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

Recent Results

Toxic Trail 37
Port Mayaca, FL - 25 finishers
37 Miles
John Cappis 50K Fat Ass
Silverton, CO - 25 finishers
50 KM | 19 Hours
Vulture Vista Ultra
Greencastle, IN - 62 finishers
12 Hours | 6 Hours
Six Days In the Dome-WI
Milwaukee, WI - 2 finishers
72 Hours | 48 Hours
Centurion Ultra Trail Event
Stratford, CT - 39 finishers
33 Hours
Buckeye Trail 50K - Summer
Brecksville, OH - 193 finishers
50 KM
McCall Trailrunning Classic
McCall, ID - 19 finishers
50 KM
Trippen through the Timber
payson, UT - 20 finishers
50 KM
Hollis Heat: Time Trials
Ellenboro, NC - 13 finishers
50 KM
Chase the Moon Endurance Run
Highlands Ranch, CO - 107 finishers
50 KM | 12 Hours | 6 Hours
View All Results