from $600
RegisterCalifornia race calendar
October 2026 races in California
Triathlons and bike races in California in October 2026: 24 upcoming triathlons, duathlons, aquabikes, and rides with dates and entry fees.
24
upcoming races
2,026
year
By distance
October 2026
HART PARK AFTER WORK 5K and MTB SERIES RACE #4
Bakersfield, California5:45 PM start
from $5
Register
from $10
RegisterSGRAIL Marin - Triathlon & Trail Half Marathon
San Rafael, California5:00 PM startTrailOpen water swim
from Free
RegisterGrizzly Gravel & Century Charity Ride
North Fork, California7:00 AM start
from $88
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from $40
Register
from $27.93
Register
from $10
Register2026 XTERRA WETSUITS Mission Bay Triathlon & San Diego 5K
San Diego, California6:40 AM startOpen water swim
from $46
RegisterAggieathlon (UC Davis Triathlon Club)
Davis, California7:15 AM startPool swim
from $35
Register
from Free
Register
from $15
Register
from Free
Register
from $45
Register
from $125
Register2026 Cal Tri LA - 10.18.26
Playa Del Rey, California7:50 AM startOpen water swim
from Free
RegisterLake Evans Triathlon, 5k & 10k
Bakersfield, California8:45 AM startOpen water swim
from $50
Register
from Free
RegisterBearathlon 2026
Berkeley, California7:00 AM startOpen water swim
from $60
Register
from $25
RegisterFinish The Ride and Finish The Run Santa Clarita
Valencia, California7:00 AM start
from $15
Register
from $165
Registerfrom Free
Register
from $20
Register