| Reservoir Dogs Trail Run |
35K, 1/2 Marathon, 10K |
Sat – Oct 04, 2025 |
CA |
Orinda |
register |
| SFRC Womens Headlands Half Marathon |
Women’s Half Marathon |
Sat – Oct 04, 2025 |
CA |
Mill Valley |
register |
| Kokanee Trail Runs |
1/2 Marathon, 10K, 5K, 1/2 Mile |
Sun – Oct 05, 2025 |
CA |
South Lake Tahoe |
register |
| Mile Madness Endurance Run |
72hrs, 48hrs |
Fri – Oct 10, 2025 |
CA |
Rocklin |
register |
| Mile Madness Endurance Run |
100 Mile Plus, 24hrs, 12hrs, Saturday 12hr PM, 6hrs, Saturday Glow Run |
Fri – Oct 10, 2025 |
CA |
Rocklin |
register |
| The Biggest Little Ultra |
100 Miles Race, 50 Miles Race, 48 Hour Race, 24 Hour – FRI, 12 Hour – FRI, 6 Hour – FRI |
Fri – Oct 10, 2025 |
NV |
Sparks |
register |
| The Biggest Little Ultra |
6 Per 12H Relay, 5 Per 12H Relay, 4 Per 12H Relay, 3 Per 12H Relay, 2 Per 12H Relay, 24 Hour – Sat |
Fri – Oct 10, 2025 |
NV |
Sparks |
register |
| Mile Madness Endurance Run |
Sunday 12hr, Sunday 6hr |
Fri – Oct 10, 2025 |
CA |
Rocklin |
register |
| The Napa Lapa Trail Adventure |
12 Hour, 12 Hour Relay, 6 Hour, 3 Hour |
Sat – Oct 11, 2025 |
CA |
Napa |
register |
| Ruth Anderson Memorial Endurance Run |
Ultradistance |
Sat – Oct 11, 2025 |
CA |
San Francisco |
register |
| Euchre Bar Massacre |
50 Miler, 25 Miler |
Sat – Oct 11, 2025 |
CA |
Foresthill |
register |
| Mt. Umunhum Trail Conquest-Fall |
50K, Trail Marathon, 30K, Half Marathon, 7 Miler, 5K |
Sat – Oct 11, 2025 |
CA |
San Jose |
register |
| Go Wild! Marin 2 Hr, 4 Hr |
4Hr, 2Hr |
Sat – Oct 11, 2025 |
CA |
Corte Madera |
register |
| The Jackalope Lope |
50K, 20 Miler, 8 Miler |
Sat – Oct 18, 2025 |
CA |
Redding |
register |
| Jacks Valley Trail Rally |
21K, 10K, 5K |
Sat – Oct 18, 2025 |
NV |
Carson City |
register |
| California Fall Classic 100K / 55K at Lake Sonoma |
100K, 55K |
Sat – Oct 18, 2025 |
CA |
Healdsburg |
register |
| Haunted Flats 5K, 10K |
10K, 5K |
Sat – Oct 18, 2025 |
CA |
Sacramento |
register |
| California Gold Rush Trail Run – Fall |
Half Marathon, 15K, 10K, 5K, Mile, Kids Run |
Sat – Oct 18, 2025 |
CA |
Coloma |
register |
| Peavine Peak Hill Climb |
9.4 Miler |
Sat – Oct 18, 2025 |
NV |
Reno |
register |
| Willow Hills XC |
5K Women, 5K Open Men, 5K Masters Men |
Sat – Oct 18, 2025 |
CA |
Folsom |
register |
| Weekend at Burney |
48hrs, 24hrs, 13.8 Miler, 13.8 W/ Burro, 12hrs, 12 hr W/ Burro, 4.6 Miler, 4.6 W/ Burro |
Thr – Oct 23, 2025 |
CA |
Burney |
register |
| Oakland Hills Trail Run |
35K, 1/2 Marathon, 10K |
Sat – Oct 25, 2025 |
CA |
Oakland |
register |
| The Rubicon |
The Requisite |
Sat – Oct 25, 2025 |
CA |
Oxbow Reservoir |
register |
| Quicksilver Trail Challenge |
Half Marathon, 10K |
Sat – Oct 25, 2025 |
CA |
San Jose |
register |
| Trail Run at Sly Park – Fall |
50K, Trail Marathon, 17 Miler, Half Marathon, 8 Miler, 10K, 5K |
Sat – Oct 25, 2025 |
CA |
Pollock Pines |
register |
| Haunted Hills 5K & 10K Redwood City |
10K, 5K |
Sat – Oct 25, 2025 |
CA |
Redwood City |
register |
| Nevada Day Classic |
8K, 2 Miler |
Sat – Nov 01, 2025 |
NV |
Carson City |
register |
| Almaden Hills Trail Run – Fall |
50K, Trail Marathon, 30K, Half Marathon, 8 Mile, 10K, 5K |
Sat – Nov 01, 2025 |
CA |
San Jose |
register |
| NorCal Backyard Ultra |
Last Person Standing |
Fri – Nov 07, 2025 |
CA |
Granite Bay |
register |
| NorCal Backyard Ultra |
Mini Last Person |
Fri – Nov 07, 2025 |
CA |
Granite Bay |
register |
| Rancho Hills Trail Run – Fall |
50K, Marathon, 30K, Half Marathon, 10 Miler, 8 Mile, 10K, 5K |
Sat – Nov 08, 2025 |
CA |
Morgan Hill |
register |
| Hidden Valley Hammer |
10K, 5K |
Sat – Nov 08, 2025 |
NV |
Reno |
register |
| Mt. Tam Trail Run |
50K, 30K, 1/2 Marathon, 10K |
Sat – Nov 08, 2025 |
CA |
Stinson Beach |
register |
| Lithia Loop |
Marathon, Half-Marathon, 10k |
Sat – Nov 08, 2025 |
OR |
Ashland |
register |
| Ferris Fifty |
50 Miler, 50K, 15K |
Sat – Nov 08, 2025 |
NV |
Minden |
register |
| Falcon Crest Winter Trail Challenge |
Marathon, 30K, 1/2 Marathon, 15K, 10K, 5K |
Sat – Nov 15, 2025 |
CA |
El Dorado Hills |
register |
| Desert Island Trail Runs |
21K, 10K, 5K |
Sat – Nov 15, 2025 |
NV |
Carson City |
register |
| Darrington Single Track Trail Challenge |
36 Miler, 18 Miler, 10K, 5K |
Sat – Nov 22, 2025 |
CA |
Pilot Hill |
register |
| Healdsburg Turkey Trot |
5K |
Thr – Nov 27, 2025 |
CA |
Healdsburg |
register |
| Run Hunger Off the Divide 10K/5K Run |
10K, 5K |
Thr – Nov 27, 2025 |
CA |
Cool |
register |
| Quad Dipsea |
28.4 Miler |
Sat – Nov 29, 2025 |
CA |
Mill Valley |
register |
| Peacock Gap Trail Run |
30K, 1/2 Marathon, 10K |
Sat – Dec 06, 2025 |
CA |
San Rafael |
register |
| Calero Trail Run – Winter |
50K, Trail Marathon, 25K, Half Marathon, 15K, 10K, 5K, Mile, Kids Run |
Sat – Dec 06, 2025 |
CA |
San Jose |
register |
| Hunter S. Thompson Fear & Loathing |
50 Miler, 50K |
Sun – Dec 07, 2025 |
CA |
San Francisco |
register |
| Holiday Hustle 5K, 10K Sacramento |
10K, 5K |
Sat – Dec 13, 2025 |
CA |
Sacramento |
register |
| Doomsday |
50K, Half Marathon |
Sat – Dec 13, 2025 |
CA |
Cool |
register |
| Holiday Hustle 5K, 10K Walnut Creek |
10K, 5K |
Sat – Dec 13, 2025 |
CA |
Walnut Creek |
register |
| Folsom Lake Point to Point Trail Half Marathon |
1/2 Marathon |
Sat – Dec 13, 2025 |
CA |
El Dorado Hills |
register |
| Placerville’s Holiday Jingle & Mingle Run |
Half Marathon, 15k, 10k, 5k, Mile, Kids Run |
Sat – Dec 20, 2025 |
CA |
Placerville |
register |
| Woodside Ramble |
50K, 35K, 1/2 Marathon, 10K |
Sat – Dec 20, 2025 |
CA |
Redwood City |
register |
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