Some ultras in Northern California (& Nevada) shorter than 100 miles
DateRaceDist.LocationClimb/Descent
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 ?'/?'
20-Jun-26 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'
18-Jul-26 Tahoe Rim Trail 50k/56m Lake Tahoe, NV 6895'/6895' - 9894'/9894'
25-Jul-26 Lost Sierra 50km/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'
22-Aug-26 Trail Run at Sly Park 50k Pollock Pines ?'/?'
30-Aug-26 Crystal Springs 50k Woodside 4530'/4530'
6-Sep-26 Diablo 50k Clayton 7990'/7990'
12-Sep-26 Berkeley Trail Adventure 50k Oakland 4500'/4500'
12-Sep-26 Mendocino Running Festival 6hr/12hr Mendocino ?'/?'
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-26 Euchre Bar Massacre 50m Foresthill 20000'/20000'
17-Oct-26 Tahoe Midnight Express 50m/72m So. Lake Tahoe ?'/?'
17-Oct-26 Sonoma Fall Classic 50m Healdsburg ?'/?'
19-Oct-26 Mile Madness 6hr/12hr/24hr/48hr/72hr Rocklin ?'/?'
24-Oct-26 Trail Run at Sly Park 50k Pollock Pines ?'/?'
31-Oct-26 Almaden Hills Trail Run 50k San Jose ?'/?'
7-Nov-26 Lake Chabot 50k Castro Valley 2670'/2670'
7-Nov-26 Mt. Tam 50k Stinson Beach ?'/?'
7-Nov-26 Rio 50K 50k Folsom ?'/?'
28-Nov-26 Quad Dipsea 28.4m Mill Valley 9276'/9276'
5-Dec-26 San Joaquin River Trail 50km/100km Friant ?'/?'
5-Dec-26 Calero Trail Run 50k San Jose ?'/?'
6-Dec-26 HST Fear & Loathing 50k/50m San Francisco 2739'/2743'
19-Dec-26 Woodside Ramble 50k Woodside 4530'/4530'
31-Dec-26 New Year's One Day 6hr/12hr/24hr/100mi San Jose 0'/0'
2-Jan-27 Hacienda Hills Run 50k San Jose ?'/?'
3-Jan-27 Epiphany Ultra 72k Oakland 2750'/2750'
9-Jan-27 Fat Ass 50k Saratoga ?
9-Jan-27 No Hands 50k American River Canyon ?'/?'
17-Jan-27 Crystal Springs 50k Woodside 4530'/4530'
23-Jan-27 Golden Gate(Spartan) 50k/50mi San Francisco ?'/?'
30-Jan-27 Jed Smith 50k/50m Sacramento 540'/960'
6-Feb-27 Golden Gate 50k Rodeo Beach 6320'/6320'
6-Feb-27 Fort Ord/Monterey 50k/50m Monterey ?'/?'
7-Feb-27 Giro di Fremont 60k Fremont 4400'/4800'
13-Feb-27 Second Saratoga Fat Ass 50k Saratoga ?/?
6-Feb-27 Mt. Umunhum Trail Conquest 50k San Jose ?'/?'
20-Feb-27 Montara Mountain 50k Pacifica 6700'/6700'
21-Feb-27 Overgrown 50k Los Gatos 6542'/6542'
21-Feb-26) FOURmidable 50k Auburn ?'/?'
27-Feb-27 Salmon Falls 50k Pilot Hill 3500'/3500'
28-Feb-27 Las Trampas 50k Castro Valley 10600'/10600
6-Mar-27 Skyline Ridge Trail Run 50k La Honda 5328'/5328'
13-Mar-27 Way Too Cool 50k Cool 6113'/6107'
13-Mar-27 Marin Ultra Challenge 50k/50m Sausalito 6900'/6900' - 11000'/11000'
(14-Mar-26) Ruck-a-Chuck 50k Foresthill ?'/?'
19-Mar-27 Big Alta 50k Marinwood ?'/?'
20-Mar-27 Redwood Trail 50k Oakland 5495'/5495'
20-Mar-27 Big Alta 100k Marinwood ?'/?'
20-Mar-27 Folsom Lake Southside 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 ?'/?'
(12-Apr-26) Napa Valley 50k Calistoga ?'/?'
17-Apr-27 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-27 SPASM Lake Chabot 50k Castro Valley 2670'/2670'
(24-Apr-26) The Canyons 50k/100k Foresthill 9200'/9200' - 14000'/14000'
1-May-27 Miwok Trail 100k Stinson Beach 11628'/11628'
(2-May-26) Hacienda Hills Run 50k San Jose ?'/?'
8-May-27 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 ?'/?'

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: 5/31/26) StanJ@Run100s.com