Thunder River
Oct 31Cascade Locks, OR50K, 25K
41 mi from Portland Trail Series - Fall, similar trail technicality to Portland Trail Series - Fall, registration open
Aid stations, cutoffs and pacing in one plan, with the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.
Build my planA five-race evening trail series in Portland's Forest Park, with different challenging courses of approximately 4 to 7 miles. Some Fall races are held in the dark and require a headlamp.
Single-race drop-in ends
Jun 30, 2026
Registration opens
Jul 1, 2026
All five Fall races - early registration ends
Jul 15, 2026
Registration closes
Aug 26, 2026
Race day
Oct 14, 2026
Current price
$95
All five Fall races
Price progression
Registration openings and major changes, like a new date or a cancellation.
Can't race, or need an entry? Post it here so nobody has to ask if it's still available.
Oct 31Cascade Locks, OR50K, 25K
41 mi from Portland Trail Series - Fall, similar trail technicality to Portland Trail Series - Fall, registration open
Oct 17Tillamook, OR50K, 25K +1
40 mi from Portland Trail Series - Fall, the same weekend as Portland Trail Series - Fall, registration open
Oct 9Saint Paul, OR5K
26 mi from Portland Trail Series - Fall, 1 week before Portland Trail Series - Fall, registration open
Oct 16Silverton, OR5K
37 mi from Portland Trail Series - Fall, the same weekend as Portland Trail Series - Fall, registration open
Straight-line distance
Oct 9Saint Paul, OR5K
Oct 10Rainbow, OR50K, 20K
Oct 16Silverton, OR5K
Oct 16Silverton, OR50K, Marathon +3
Oct 17Mcminnville, OR10K, 5K
Oct 17Prospect, OR50 mi, 50K +2
Oct 17Tillamook, OR50K, 25K +1
Oct 17Union Creek, OR50 mi, 50K
Oct 18Silverton, ORHalf Marathon
Oct 23South Beach, OR48 hr, 24 hr
Oct 24St. Paul, OR50 mi, 50K +1
Oct 24Sisters, OR24 hr, 12 hr +1
May 29, 2027Portland, OR50K
Feb 13, 2027Gaston, OR50K, 25K
Apr 24, 2027Buxton, OR100 mi, Relay
Apr 25, 2027Buxton, ORStub Trail Challenge
Aug 13, 2027Cougar, WA20 mi
Oct 10Tacoma, WA50K, 30K +1
Oct 10Seattle, WA5K
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Build my planAre you the race director for Portland Trail Series - Fall?
Claim this race to manage registration, volunteers, and race day.