Sonoma Fall Classic 100 Mile

Results: 2026

36 of 76 starters finished.

UltraSignup's results list 36 finishers and 40 DNFs, matching UltraLive's final count of 76 starters, 36 finishers, 40 drops and 21 entrants who did not start. Marisa Pasnick (25:56:16, eighth overall) and Sydney Chesta (27:34:16, 11th) were second and third among women, and Andrew Schafer was the last finisher in 35:29:09. A runner shown in third place on the live tracking early on Sunday is listed as a DNF in both final sources.

Source: UltraSignup — Sonoma Fall Classic 100 Mile 2026 results. Checked October 19, 2026.

Event Overview

A new 100.5-mile, two-loop race at Lake Sonoma, with an estimated 25,058 ft of climbing and a 36-hour limit.

Course & Terrain

Two 50.25-mile loops from Lake Sonoma Recreation Area, including the Pritchett Peaks climb and lakeside singletrack.

Format & Support (as run)

Why This Race Matters

Aravaipa Running and Healdsburg Running Company launched this festival in October 2026 with Tropical John Medinger. The new 100-miler joins the established Lake Sonoma 50 Mile, which moved to the autumn festival; the 50-mile course records do not apply to this inaugural 100-mile race.

Historical benchmark notes in the directory record (verify current records with the linked official sources):

• Inaugural 100-mile edition in 2026; no previous course record.

Preparing for a Race Like Sonoma Fall Classic 100 Mile

The 100-mile race guide covers the format as a whole. These guides go deeper:

• Walking strategy for ultramarathons: When and how to walk by terrain, effort and cutoffs.
• Crew and aid-station strategy: Crew tables, aid stops, drop bags and runner preferences.
• Gut training for ultrarunners: A six-week practice sequence for race-day fueling.
• Tapering for ultramarathons: Plan the taper and race week around your own recovery.

Planning Notes

• Treat intermediate cutoff gates as part of the course. Build enough margin for aid stops and late-race slowdown, and verify every current gate in the official rules.
• Train for terrain-specific fatigue. Technical trails and mountain courses demand downhill durability, hiking efficiency, and reliable night lighting.
• The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.

Related Preparation

• Compare verified US 100-mile races
• Compare this race in the full 2026 calendar
• Open the 100-Mile format guide
• Open the Fixed-Distance format guide
• Compare all race formats
• Use the timed-race pace calculator
• Plan checkpoint arrivals and cutoff buffers
• Print a pace band for your goal time
• Estimate race calories and plan fueling
• Build a crew and drop-bag plan
• Build a race-specific gear checklist