Some ultras in Northern California (& Nevada) shorter than 100 miles
DateRaceDist.LocationClimb/Descent
3-Nov-18 Woodside 50k Woodside 4530'/4530'
3-Nov-18 Lake Chabot 50k Castro Valley 2670'/2670'
10-Nov-18 Mt. Tam 50k Stinson Beach 7000'/7000'
17-Nov-18 Meat Grinder 50k Newcastle 3300'/3300'
17-Nov-18 Trail Run at Sly Park 50k Pollock Pines ?'/?'
17-Nov-18 North Face 50k/50m Sausalito ?'/?'
24-Nov-18 Quad Dipsea 28.4m Mill Valley 9276'/9276'
1-Dec-18 Vista Verde Skyline 50km Woodside ?'/?'
1-Dec-18 Calero Run 50km San Jose ?'/?'
8-Dec-18 HST Fear & Loathing 50k/50m San Francisco 2739'/2743'
8-Dec-18 Rodeo Beach 50k Sausalito 5980'/5980'
9-Dec-18 Spooner's Cove 50k Los Osos 6400'/6400'
15-Dec-18 Snowberry Creek 50k Folsom 2700'/2700'
15-Dec-18 Woodside Ramble 50k Woodside 4530'/4530'
5-Jan-19 New Year's One Day 6hr/12hr/24hr San Francisco 0'/0'
(6-Jan-18) Eldrith Gosney's Pure Ultra 50k Mill Valley 6498'/6498'
(7-Jan-18) Epiphany Ultra 67k Oakland 2750'/2750'
12-Jan-19 Steep Ravine 50k Stinson Beach 5770'/5770'
12-Jan-19 One Day in Auburn 6hr/12hr/24hr Auburn ?'/?'
(13-Jan-18) Fat Ass 50k Saratoga ?
20-Jan-19 Crystal Springs 50k Woodside 4530'/4530'
(27-Jan-18) Folsom Lake Sweet Water 50k Folsom ?'/?'
2-Feb-19 Fort Ord/Ordnance 50k/100k Monterey ?'/?'
(3-Feb-18) Jed Smith 50k/50m Sacramento 540'/960'
9-Feb-19 Golden Gate 50k Rodeo Beach 6320'/6320'
16-Feb-19 Chabot Trail 50k Castro Valley ?'/?'
16-Feb-19 FOURmidable 50k Auburn ?'/?'
17-Feb-19 Montara Mountain 50k Pacifica 6700'/6700'
(24-Feb-18) Mt. Umunhum 52k San Jose ?'/?'
(24-Feb-18) Salmon Falls 50k Pilot Hill 3500'/3500'
2-Mar-19 Way Too Cool 50k Cool 6113'/6107'
9-Mar-19 Marin Ultra Challenge 50k/50m Sausalito 6900'/6900' - 11000'/11000'
(17-Mar-18) Montana de Oro 50k Los Osos ?'/?'
(17-Mar-18) 4MPH Challenge ? Whiskeytown ?'/?'
(17-Mar-18) Ruck a Chuck 50k Foresthill ?'/?'
(17-Mar-18) Folsom South Side 50k/38mi Folsom ?'/?'
(31-Mar-18) San Jose Trail 50k San Jose ?'/?'
6-Apr-19 American River 50m Sacramento 3474'/2139'
6-Apr-19 Woodside Crossover 50k Woodside 4610'/4610'
(7-Apr-18) Napa Valley 50k Calistoga ?'/?'
13-Apr-19 Lake Sonoma 50m Geyserville 10500'/10500'
(14-Apr-18) K2 Challenge 6hr Auburn ?'/?'
(14-Apr-18) Diablo Trails Challenge 50k Brentwood ?'/?'
14-Apr-19 Grizzly Peak 50k Berkeley 6760'/6760'
20-Apr-19 Folsom Lake 50k Folsom 2030'/2030'
(21-Apr-18) Ruth Anderson Memorial Endurance Run 50k/50m/100k San Francisco 1450'/1450'
(21-Apr-18) Mendocino 50k Mendocino 4708'/4708'
(21-Apr-18) Mokelumne River 50k/50m Lake Camanche ?'/?'
27-Apr-19 The Canyons 50k/100k Foresthill 9200'/9200' - 14000'/14000'
(28-Apr-18) Whiskeytown Waterfalls 50k Whiskeytown 7500'/7500'
(28-Apr-18) Sierra Azul Trail Challenge 50k Los Gatos ?'/?'
4-May-19 Miwok Trail 100k Stinson Beach 11628'/11628'
(5-May-18) Armstrong Redwoods 50k Guerneville ?'/?'
5-May-19 Horseshoe Lake 50k Palo Alto 4560'/4560'
(12-May-18) Quicksilver 50k/100k San Jose 6000'/12000'
11-May-19 Cinderella 50k Oakland 5495'/5495'
(12-May-18) Trail Run at Sly Park 50k Pollock Pines ?'/?'
(19-May-18) Ancient Redwood Running Festival 6hr/12hr Philo ?'/?'
(19-May-18) Mt. Diablo 50k Clayton ?'/?'
18-May-19 San Francisco 50k/50m Sausalito 9565'/9565'
(19-May-18) Silver State 50k/50m Reno, NV 5800'/6100' - 9200'/9200'
19-May-19 Ohlone Wilderness 50k Fremont 8530'/8160'
(2-Jun-18) Bishop High Sierra Ultras 50k/50m/100k Bishop ?'/?'
(2-Jun-18) San Francisco Summer Solstice 6hr/12hr/24hr San Francisco 0'/0'
(2-Jun-18) Calero Run 50k/50m San Jose ?'/?'
2-Jun-19 Big Basin 50k Los Gatos 5790'/5790'
15-Jun-19 Canyon Meadow 50k Oakland 3812'/3812'
22-Jun-19 Rodeo Valley 50k Sausalito 6000'/6000'
22-Jun-19 San Lorenzo River 50k Santa Cruz 5175'/5175'
(1-Jul-18) Run with the Ponies 32m Georgetown ?'/?'
6-Jul-19 Golden Gate 50k Rodeo Beach 6320'/6320'
(7-Jul-18) Dirty Dozen 6hr/12hr Pinole ?'/?'
(7-Jul-18) Lovers Leap of Faith 50k/50m Strawberry ?'/?'/?
(14-Jul-18) Salt Point 50k Jenner ?'/?'
(14-Jul-18) Rancho Trail Run 50k Morgan Hill ?'/?'
13-Jul-19 SPASM Lake Chabot 50k Castro Valley 2670'/2670'
(21-Jul-18) Tahoe Rim Trail 55k/50m Lake Tahoe, NV 6895'/6895' - 9894'/9894'
(28-Jul-18) Pacifica Trail 50k Pacifica ?'/?'
(28-Jul-18) Pioneer Spirit 50m Auburn-to-Folsom ?'/?'
(29-Jul-18) Worth the Hurt 52m San Francisco ?'/?'
(4-Aug-18) Sierra Crest 50k Tahoe Donner ?'/?'
(4-Aug-18) The Ridge 62k Lagunitas ?'/?'
(4-Aug-18) Kirkwood's Thunder Mtn. 50k Kirkwood ?'/?'
(5-Aug-18) Skyline 50k Castro Valley 4740'/4740'
4-Aug-19 Crystal Springs 50k Woodside 4530'/4530'
10-Aug-19 Cinderella 50k Oakland 5495'/5495'
(11-Aug-18) Trinity Alps 55k Lake Siskiyou ?'/?'
10-Aug-19 Cool Moon 50m/100k Cool 8000'/11000'
(18-Aug-18) Castle Peak 100k Truckee ?'/?'
(18-Aug-18) Mount Madonna 50k Watsonville ?'/?'
(18-Aug-18) Run-de-Vous 50k/50m San Martin ?'/?'
(18-Aug-18) Robinson Flat 50k Foresthill ?'/?'
24-Aug-19 Golden State 50k Monterey ?'/?'
(25-Aug-18) Tamalpa Headlands 50K 50k Rodeo Beach 6521'/6521'
25-Aug-19 Diablo 50k Clayton 7990'/7990'
(25-Aug-18) Almaden Hills 50k San Jose ?'/?'
(1-Sep-18) Headlands 50m/75m Sausalito 10034'/10034'
(15-Sep-18) Folsom Lake Ultra 110k Auburn 6228'/6228'
(15-Sep-18) Echo Summit Trail Challenge 50k Echo Summit ?'/?'
(16-Sep-18) Whiskey Hill Redwood Run 50k Woodside ?'/?'
21-Sep-19 Coastal 50k Stinson Beach 5090'/5090'
(22-Sep-18) Berkeley Trail Adventure 50k Oakland 4500'/4500'
(22-Sep-18) Stevens Creek 50k Cupertino 5000'/5000'
(29-Sep-18) Overlook 50k/50m Foresthill ?'/?'
(29-Sep-18) Headwaters Ultra 50k Mount Shasta 5600'/5600'
(6-Oct-18) Bay Ridge/Dick Collins 50m/100k Castro Valley 7000'/7000' - 8500'/8500;
(6-Oct-18) Skyline to the Sea 50k Saratoga Gap 3000'/3000'
(12-Oct-18) Lake Tahoe 50m/72m So. Lake Tahoe ?'/?'
13-Oct-19 Bizz Johnson 50k Susanville ?'/?'
(13-Oct-18) Coyote Ridge 50k Muir Beach 7130'/7130'
(13-Oct-18) Santa Barbara 100k 100k Santa Barbara 13530'/13530'
(13-Oct-18) Euchre Bar Massacre 50mi Foresthill 20000'/20000'
(13-Oct-18) Sac River 55k Redding ?'/?'

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: 10/14/18) StanJ@Run100s.com