Overall Rating
Overall Rating (1 Review)
5
(1 Rating)  (1 Review)
DIFFICULTY
4
SCENERY
4
PRODUCTION
5
SWAG
5
Come experience one of the most RELENTLESS and beautiful ultras on the West Coast, with two ‘California Classic’ courses that navigate miles upon miles of single track with majestic views of Lake Sonoma, nestled in the beauty of wine country during harvest season. The fall date will make the CSC100K … MORE
Local Historical Weather (Oct 19):
  2024 2023 2022 2021 2020
 
H (°F)  84  90  87  66  83
L (°F)  52  51  48  43  48
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Recent reviews

    Wow, relentless is 100% accurate. The singletrack is awesome on this course. Rolling and fun. The fire road in the middle was a soul sucker as it got as high … MORE

    Wow, relentless is 100% accurate. The singletrack is awesome on this course. Rolling and fun. The fire road in the middle was a soul sucker as it got as high as 99 on mine and my husbands watch so it got pretty hot on that exposed section. But the aide stations were great, the volunteers were amazing. The ascent was 13,780 feet! Nuts! I am so proud of myself for finishing. First 100K on the books.

    DIFFICULTY
    4
    PRODUCTION
    5
    SCENERY
    4
    SWAG
    5
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  1. Races
  2. California Fall Classic at Lake Sonoma 100K & 55K