Some ultras in Northern California (& Nevada) shorter than 100 miles
DateRaceDist.LocationClimb/Descent
21-Feb-26 Montara Mountain 50k Pacifica 6700'/6700'
21-Feb-26 Redtail Ridge 50k Castro Valley ?'/?'
21-Feb-26 FOURmidable 50k Auburn ?'/?'
22-Feb-26 Las Trampas 50k Castro Valley 10600'/10600
28-Feb-26 Salmon Falls 50k Pilot Hill 3500'/3500'
7-Mar-26 Skyline Ridge Trail Run 50k La Honda 8063'/8063'
7-Mar-26 Way Too Cool 50k Cool 6113'/6107'
14-Mar-26 Marin Ultra Challenge 50k/50m Sausalito 6900'/6900' - 11000'/11000'
14-Mar-26 Ruck-a-Chuck 50k Foresthill ?'/?'
14-Mar-26 Folsom Lake Southside Trail Run 50k Folsom ?'/?'
20-Mar-26 Big Alta 50k Marinwood ?'/?'
21-Mar-26 Redwood Trail 50k Oakland 5495'/5495'
(22-Mar-25) South Hills Single Track Trail Run 50k San Jose ?'/?'
28-Mar-26 Folsom Lake Falcon Crest Trail Run 50k Folsom ?'/?'
4-Apr-26 American River 50m Sacramento 3474'/2139'
4-Apr-26 Diablo Trails Challenge 50k Brentwood ?'/?'
11-Apr-26 Lake Sonoma 50km/100km Healdsburg ?'/?'
11-Apr-26 SPASM Lake Chabot 50k Castro Valley 2670'/2670'
12-Apr-26 Napa Valley 50k Calistoga ?'/?'
18-Apr-26 Horseshoe Lake 50k Palo Alto 4560'/4560'
18-Apr-26 Woodside Crossover 50k Woodside ?'/?'
18-Apr-26 Mendocino Coast 50k Mendocino 4708'/4708'
18-Apr-26 Sierra Azul Trail Challenge 50k Los Gatos ?'/?'
24-Apr-26 The Canyons 50k/100k Foresthill 9200'/9200' - 14000'/14000'
2-May-26 Miwok Trail 100k Stinson Beach 11628'/11628'
2-May-26 Hacienda Hills Run 50k San Jose ?'/?'
9-May-26 Quicksilver 50k/100k San Jose 6000'/13000'
9-May-26 Grizzly Peak 50k Berkeley 6760'/6760'
9-May-26 Trail Run at Sly Park 50k Pollock Pines ?'/?'
16-May-26 Silver State 50k/50m Reno, NV 5800'/6100' - 9200'/9200'
16-May-26 Bishop High Sierra 55k/50m/100k Bishop ?'/?'
16-May-26 Napa Wilderness 50k Napa 5547'/7224'
16-May-26 Rim Rock 50m Napa ?'/?'
30-May-26 Cinderella 50k Oakland 5495'/5495'
30-May-26 Calero Trail Run 50k San Jose ?'/?'
13-Jun-26 SF Half Day 6hr/12hr San Francisco 0'/0'
13-Jun-26 Cool Moon 50m/100k Cool 8000'/11000'
20-Jun-26 Golden State 50k Monterey ?'/?'
(21-Jun-25) Headwaters Ultra 56k Mount Shasta 5600'/5600'
4-Jul-26 Rancho Hills Trail Run 50k San Jose ?'/?'
11-Jul-26 San Lorenzo River 50k Santa Cruz 5175'/5175'
(19-Jul-25) Tahoe Rim Trail 50k/56m Lake Tahoe, NV 6895'/6895' - 9894'/9894'
25-Jul-26 Lost Sierra 5okm/100km Downieville ?'/?'
25-Jul-26 SF Ultra 52m San Francisco ?'/?'
31-Jul-26 Folsom 54m Folsom ?'/?'
1-Aug-26 Rodeo Valley 50k Sausalito 6000'/6000'
2-Aug-26 Skyline 50k Castro Valley 4740'/4740'
8-Aug-26 Napa Lapa @ Skyline 6hr/12hr Napa ?'/?'
15-Aug-26 Tamalpa Headlands 50k Muir Beach 6309'/6309'
15-Aug-26 Redwood (Summer) Trail 50k Oakland 5495'/5495'
15-Aug-26 Almaden Hills Trail Run 50k San Jose ?'/?'
22-Aug-26 Trail Run at Sly Park 50k Pollock Pines ?'/?'
(31-Aug-25) Crystal Springs 50k Woodside 4530'/4530'
(6-Sep-25) Mendocino Running Festival 6hr/12hr Mendocino ?'/?'
(7-Sep-25) Diablo 50k Clayton 7990'/7990'
12-Sep-26 Berkeley Trail Adventure 50k Oakland 4500'/4500'
26-Sep-26 Dick Collins Firetrails 50m Castro Valley 8500'/8500'
10-Oct-26 Ruth Anderson Memorial Endurance Run 50k/50m San Francisco 1450'/1450'
(10-Oct-25) Mile Madness 6hr/12hr/24hr/48hr/72hr Rocklin ?'/?'
(11-Oct-25) Euchre Bar Massacre 50m Foresthill 20000'/20000'
17-Oct-26 Tahoe Midnight Express 50m/72m So. Lake Tahoe ?'/?'
(18-Oct-25) Sonoma Fall Classic 50m Healdsburg ?'/?'
24-Oct-26 Trail Run at Sly Park 50k Pollock Pines ?'/?'
(1-Nov-25) Almaden Hills Trail Run 50k San Jose ?'/?'
7-Nov-26 Mt. Tam 50k Stinson Beach ?'/?'
7-Nov-26 Rio 50K 50k Folsom ?'/?'
(8-Nov-25) Lake Chabot 50k Castro Valley 2670'/2670'
(22-Nov-25) Golden Gate(Spartan) 50k/50mi San Francisco ?'/?'
28-Nov-26 Quad Dipsea 28.4m Mill Valley 9276'/9276'
(6-Dec-25) Calero Trail Run 50k San Jose ?'/?'
(6-Dec-25) San Joaquin River Trail 50km/100km Friant ?'/?'
6-Dec-26 HST Fear & Loathing 50k/50m San Francisco 2739'/2743'
(20-Dec-25) Woodside Ramble 50k Woodside 4530'/4530'
31-Dec-26 New Year's One Day 6hr/12hr/24hr/100mi San Jose 0'/0'
(3-Jan-26) Hacienda Hills Run 50k San Jose ?'/?'
(4-Jan-26) Epiphany Ultra 72k Oakland 2750'/2750'
(10-Jan-26) Fat Ass 50k Saratoga ?
(10-Jan-26) No Hands 50k American River Canyon ?'/?'
(18-Jan-26) Crystal Springs 50k Woodside 4530'/4530'
(31-Jan-26) Jed Smith 50k/50m Sacramento 540'/960'
(1-Feb-26) Giro di Fremont 60k Fremont 4400'/4800'
(7-Feb-26) Golden Gate 50k Rodeo Beach 6320'/6320'
(7-Feb-26) Fort Ord/Monterey 50k/50m Monterey ?'/?'
(7-Feb-26) Second Saratoga Fat Ass 50k Saratoga ?/?
(7-Feb-26) Mt. Umunhum Trail Conquest 50k San Jose ?'/?'
(15-Feb-26) Overgrown 50k Los Gatos 6542'/6542'

Ultras - An ultramarathon is any running event longer than a marathon (i.e. 26.2 miles).
An ultrarun is any unusually difficult running event, regardless of distance (e.g. Pikes Peak Marathon).

"http://www.Run100s.com/sub100.htm" (updated: 2/15/26) StanJ@Run100s.com