Some ultras in Northern California (& Nevada) shorter than 100 miles
DateRaceDist.LocationClimb/Descent
15-May-21 Silver State 50k/50m Reno, NV 5800'/6100' - 9200'/9200'
15-May-22 Ohlone Wilderness 50k Fremont 8530'/8160'
(16-May-20) Mt. Diablo 50k Clayton ?'/?'
22-May-21 San Francisco 50k/50m Sausalito 9565'/9565'
22-May-21 Bishop High Sierra 50k/50m/100k Bishop ?'/?'
(22-May-21) The Cruel 50K 50k Pacifica ?'/?'
(30-May-20) The Ridge 62k Lagunitas ?'/?'
(30-May-20) 4MPH Challenge ? Whiskeytown ?'/?'
(31-May-20) Big Basin 50k Los Gatos 5790'/5790'
(6-Jun-20) The Loco Challenge 50k/100k Butte Meadows ?'/?'
(7-Jun-20) Ruck a Chuck 50k Foresthill ?'/?'
12-Jun-21 Cinderella 50k Oakland 5495'/5495'
19-Jun-21 San Lorenzo River 50k Santa Cruz 5175'/5175'
(20-Jun-20) Mt. Shasta 50k/50m Mt. Shasta ?'/?'
26-Jun-21 Rodeo Valley 50k Sausalito 6000'/6000'
(4-Jul-20) Lovers' Leap of Faith 50k/50m Strawberry ?'/?'/?
10-Jul-21 Golden Gate 50k Rodeo Beach 6320'/6320'
(11-Jul-20) Salt Point 50k Jenner ?'/?'
(11-Jul-20) Dirty Dozen 6hr/12hr Pinole ?'/?'
(11-Jul-20) Rancho Trail Run 50k Morgan Hill ?'/?'
17-Jul-21 Tahoe Rim Trail 55k/50m Lake Tahoe, NV 6895'/6895' - 9894'/9894'
24-Jul-21 Fort Ord 50k Monterey ?'/?'
(25-Jul-20) Pacifica Trail 50k Pacifica ?'/?'
31-Jul-21 Crystal Springs 50k Woodside 4530'/4530'
1-Aug-21 Skyline 50k Castro Valley 4740'/4740'
(1-Aug-20) Armstrong Redwoods 50k Guerneville ?'/?'
7-Aug-21 Redwood Trail 50k Oakland 5495'/5495'
(8-Aug-20) Coastal 50k Stinson Beach 5090'/5090'
(8-Aug-20) The Groves 50k Loma Mar ?'/?'
(8-Aug-20) Cool Moon 50m/100k Cool 8000'/11000'
(8-Aug-20) Kirkwood Mountain Ultra Challenge 50k/50m/100k/100m Kirkwood ?'/?'
21-Aug-21 Golden State 50k Monterey ?'/?'
22-Aug-21 Diablo 50k Clayton 7990'/7990'
(22-Aug-20) Castle Peak 100k Truckee ?'/?'
(22-Aug-20) Trail Run at Sly Park 50k Pollock Pines ?'/?'
28-Aug-21 Mendocino Running Festival 6hr/12hr Mendocino ?'/?'
(29-Aug-20) Tamalpa Headlands 50K 50k Rodeo Beach 6521'/6521'
(29-Aug-20) Almaden Hills Trail Run 50k San Jose ?'/?'
4-Sep-21 Lake Sonoma 50m Healdsburg 10500'/10500'
4-Sep-21 Bizz Johnson 50k Susanville ?'/?'
5-Sep-21 Lake Sonoma 100K 100m Healdsburg ?'/?'
(5-Sep-20) High Sierra 50k Kyburz ?'/?'
18-Sep-21 Berkeley Trail Adventure 50k Oakland 4500'/4500'
25-Sep-21 Bay Ridge/Dick Collins 50m/100k Castro Valley 8500'/8500' - 11000'/11000;
(26-Sep-20) Headwaters Ultra 50k Mount Shasta 5600'/5600'
(26-Sep-20) Ultra Trails Lake Tahoe (UTLT) 50k/50m Lake Tahoe ?'/?'
(26-Sep-20) Sierra Azul Trail Challenge 50k/50m/100k Los Gatos ?'/?'
(3-Oct-20) Skyline to the Sea 50k Saratoga Gap 3000'/3000'
(3-Oct-20) Echo Summit Trail Challenge 50k Echo Summit ?'/?'
(4-Oct-20) Santa Clarita Ultra 50k Santa Clarita ?'/?'
(9-Oct-21) Ruth Anderson Memorial Endurance Run 50k/50m San Francisco 1450'/1450'
(10-Oct-20) Tahoe Midnight Express 50m/72m So. Lake Tahoe ?'/?'
(10-Oct-20) Euchre Bar Massacre 50mi Foresthill 20000'/20000'
19-Oct-21 Spooner's Cove 50k Los Osos 6400'/6400'
(24-Oct-20) Vista Verde Skyline 50km Woodside ?'/?'
(31-Oct-20) Woodside 50k Woodside 4530'/4530'
6-Nov-21 Lake Chabot 50k Castro Valley 2670'/2670'
(7-Nov-20) Annual Almaden Hills Run 50k San Jose ?'/?'
(14-Nov-20) Overlook 50k/50m Foresthill ?'/?'
(14-Nov-20) Worth the Hurt 52m San Francisco ?'/?'
(14-Nov-20) Mt. Tam 50k Stinson Beach 7000'/7000'
(14-Nov-20) Two Peaks 50k/50m Redding ?'/?'
(14-Nov-20) Trail Run at Sly Park 50k Pollock Pines ?'/?'
(21-Nov-20) Headlands 50m/100k Sausalito 11410'/11410'
(23-Nov-19) Meat Grinder 50k Newcastle 3300'/3300'
27-Nov-21 Quad Dipsea 28.4m Mill Valley 9276'/9276'
27-Nov-21 Napa Valley 50k Calistoga ?'/?'
(5-Dec-20) San Joaquin River Trail 50km/100km Friant ?'/?'
(5-Dec-20) Calero Trail Run 50k San Jose ?'/?'
5-Dec-21 HST Fear & Loathing 50k/50m San Francisco 2739'/2743'
(12-Dec-20) Rodeo Beach 50k Sausalito 5980'/5980'
(14-Dec-19) Snowberry 50k Folsom 1800'/1800'
(19-Dec-20) Woodside Ramble 50k Woodside 4530'/4530'
31-Dec-21 New Year's One Day 6hr/12hr/24hr San Francisco 0'/0'
(5-Jan-20) Epiphany Ultra 69k Oakland 2750'/2750'
9-Jan-21 Fat Ass 50k Saratoga ?
(11-Jan-20) Steep Ravine 50k Stinson Beach 5770'/5770'
(11-Jan-20) One Day in Auburn 6hr/12hr/24hr Auburn ?'/?'
17-Jan-21 Crystal Springs 50k Woodside 4530'/4530'
(18-Jan-20) Fremont 50k Fremont ?'/?'
(18-Jan-20) Dead Truck 50k Auburn 5200'/5200'
(25-Jan-20) Eldrith Gosney's Pure Ultra 50k Mill Valley 6498'/6498'
6-Feb-21 Golden Gate 50k Rodeo Beach 6320'/6320'
(8-Feb-20) Calero Trail Run 50k San Jose ?'/?'
14-Feb-21 Montara Mountain 50k Pacifica 6700'/6700'
(15-Feb-20) Second Saratoga Fat Ass 50k Saratoga ?/?
(20-Feb-21) Spartan Trail 50k Saratoga ?'/?'
(22-Feb-20) Mt. Umunhum 52k San Jose ?'/?'
(22-Feb-20) Chabot Trail 50k Castro Valley ?'/?'
(27-Feb-21) Jed Smith 50k/50m Sacramento 540'/960'
(29-Feb-20) Salmon Falls 50k Pilot Hill 3500'/3500'
(6-Mar-20) Way Too Cool 50k Cool 6113'/6107'
(7-Mar-20) Montana de Oro 50k Los Osos ?'/?'
(13-Mar-21) FOURmidable 50k Auburn ?'/?'
(14-Mar-20) Pioneer Spirit 50m Auburn-to-Folsom ?'/?'
(14-Mar-20) Marin Ultra Challenge 50k/50m Sausalito 6900'/6900' - 11000'/11000'
(14-Mar-20) Folsom South Side 50k/38mi Folsom ?'/?'
(21-Mar-20) San Jose Trail 50k San Jose ?'/?'
(21-Mar-21) Whiskey Hill Redwood Run 50k Woodside ?'/?'
(28-Mar-20) Red Dragon 55k Pilot Hill 5200'/5200'
3-Apr-21 Redwood Trail 50k Oakland 5495'/5495'
(5-Apr-20) Woodside Crossover 50k Woodside 4610'/4610'
(11-Apr-20) Diablo Trails Challenge 50k Brentwood ?'/?'
(17-Apr-21) SPASM Lake Chabot 50k Castro Valley 2670'/2670'
(18-Apr-20) Saratoga Trail 50k Saratoga Gap ?'/?'
(18-Apr-20) Mokelumne River 50k Lake Camanche ?'/?'
(19-Apr-20) Forest Ranch 50k Forest Ranch ?'/?'
(23-Apr-22) Mendocino Coast 50k Mendocino 4708'/4708'
(24-Apr-21) The Canyons 50k/100k Foresthill 9200'/9200' - 14000'/14000'
(24-Apr-21) Folsom Lake 50k Folsom 2030'/2030'
(25-Apr-21) Mountain Brow House 50k Woodside ?'/?'
(25-Apr-20) Castle Crags 50k Castella ?'/?'
(25-Apr-20) Sierra Azul Trail Challenge 50k Los Gatos ?'/?'
(2-May-21) Horseshoe Lake 50k Palo Alto 4560'/4560'
(3-May-20) Red Hills Ramble 50k Tuolomne ?'/?'
7-May-22 Miwok Trail 100k Stinson Beach 11628'/11628'
(8-May-21) Quicksilver 50k/100k San Jose 6000'/12000'
(8-May-21) American River 50m Sacramento 3474'/2139'
(8-May-21) Grizzly Peak 50k Berkeley 6760'/6760'
(9-May-20) Trail Run at Sly Park 50k Pollock Pines ?'/?'

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: 5/11/21) StanJ@Run100s.com