2017 - 2018 California Ultramarathon Calendar in October

Browse our Ultramarathon Calendar for races organized in California during the month of October among 20 races.

Refine by

20 races

Cuyamaca 100K Endurance Run

October 07, 2017 To be confirmed Race day in 5 months
USA / Pacific / California / Cuyamaca Rancho State Park
Ultramarathon - 100 kilometers
UTMB Qualifier Trail Western States Qualifier

Skyline to the Sea Marathon & 50km

Skyline to the Sea 50km
October 07, 2017 Race day in 5 months
USA / Pacific / California / Saratoga Gap, Los Gatos
Ultramarathon - 50 kilometers
Trail Pacific Trail Runs

Rocky Peak Ultra Trail Race

50K Ultra Run
October 14, 2017 Race day in 5 months
USA / Pacific / California / Simi Valley
Ultramarathon - 50 kilometers
Charity Trail

Lake Tahoe Marathon

Midnight Express Ultra 72
October 14, 2017 Race day in 5 months
USA / Pacific / California / Tahoe City
Ultramarathon - 72 miles
Relay

Lake Tahoe Marathon

Tahoe Double Marathon
October 14, 2017 Cancelled
USA / Pacific / California / Tahoe City
Ultramarathon - 52.400 miles

Widowmaker Trail Runs

Widowmaker Trail 50K Run
October 04, 2015 The race has already taken place.
USA / Pacific / California / El Cajon Wilderness
Ultramarathon - 50 kilometers
Trail

100 Mile Endurance Challenge

EC 100
No race in 2016
USA / Pacific / California / Corona
Ultramarathon - 101.600 miles
Charity Road Running

100 Mile Endurance Challenge

EC 50
No race in 2016
USA / Pacific / California / Corona
Ultramarathon - 51.500 miles
Charity Road Running

Headwaters Ultra

Headwaters Ultra - 50K
October 01, 2016 The race has already taken place.
USA / Pacific / California / Mount Shasta City
Ultramarathon - 50 kilometers

Joshua Tree Ultra

100 Miler
October 08, 2016 The race has already taken place.
USA / Pacific / California / Twentynine Palms
Ultramarathon - 100 miles
Desert Trail Fast

Joshua Tree Ultra

50 Miler
October 08, 2016 The race has already taken place.
USA / Pacific / California / Twentynine Palms
Ultramarathon - 50 miles
Desert Trail Fast

Dick Collins Firetrails 50

October 08, 2016 The race has already taken place.
USA / Pacific / California / Lake Chabot
Ultramarathon - 50 miles
Trail

Owen's Peak Marathon & 10 Miler Man vs Horse Trail Event

Owen's Peak Man vs Horse 50K Trail Adventure
October 09, 2016 The race has already taken place.
USA / Pacific / California / Inyokern
Ultramarathon - 50 kilometers
Hilly Trail

Euchre Bar Massacre

Euchre Bar Massacre 50 M
October 15, 2016 The race has already taken place.
USA / Pacific / California / Foresthill
Ultramarathon - 50 miles
Trail Mountain

Rocky Peak Trail Race

October 15, 2016 The race has already taken place.
USA / Pacific / California / Simi Valley
Ultramarathon - 31 miles