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California · Lake Sonoma, CA

Sonoma Fall Classic

100 Mile50 MileMarathonRelay
Date and registration coming soonOfficial race page
…OCTSonoma Fall Classic
Date
October 2027 · date TBA
Distances
4 distances
Time limit
36 Hours
Elevation gain
+25,058 feet
Entry from
$95

What happens when the "original" Lake Sonoma 50 Mile moves to the Fall and joins forces with a 100 miler, trail marathon & relays? Come find out at the inaugural Sonoma Fall Classic - now presented by Aravaipa Running in partnership with Healdsburg Running Company & Tropical John Medinger.

Come experience one of the most relentless and beautiful ultras on the West Coast featuring miles upon miles of singletrack with majestic views of Lake Sonoma, nestled in the beauty of wine country during harvest season. With free camping, festive vibes, impeccable race atmosphere & more, come be part of the inaugural Sonoma Fall Classic!

Good to know

Event Location

100 Mile, Marathon & Relay Start: Lake Sonoma Recreation Area 3227 Stewarts Point-Skaggs Springs Rd Geyserville, CA 95441

Event Location

50 Mile Start: The Ranch at Lake Sonoma 100 Lake Sonoma Overlook Rd Geyserville, CA 95441

Camping

Half Marathon Start: Liberty Glen Liberty Glen Campground Geyserville, CA 95441

Event Location

Finish (All Races): Lake Sonoma Recreation Area 3227 Stewarts Point-Skaggs Springs Rd Geyserville, CA 95441

Event Timeline

5:00 AM - 100 Mile Sufferfest Start 5:00 AM - 50 Mile Relay Start 5:00 AM - 100 Mile Relay Start 6:30 AM - Lake Sonoma 50 Mile Start 8:00 AM - Sonoma Trail Marathon Start 10:00 AM- Half Marathon Start

Bib Pickup

Thursday - October 15 12PM-6PM Friday - October 16 12PM-7PM Healdsburg Running Company 333 Center St Healdsburg, CA 95448

Pick your distance

The numbers for each course, straight from the race page. Compare them side by side below.

Distance
100.5 Miles
Time Limit
36 Hours
Total Estimated Elevation Gain
+25,058 feet
Max Elevation
1,754' feet
Min Elevation
233' feet

Compare the distances

100 Mile50 MileMarathonHalf Marathon4-Person Relays
Distance100.5 Miles51.5 Miles26.8 Miles100 or 50 Miles - Four Runners per Team–
Time Limit36 Hours16 Hours11 Hours10 HoursTBA
Total Estimated Elevation Gain+25,058 feet+10,612 feet+5,903 feet+2,262 feet+25,058 ft or +12,529 ft
Max Elevation1,754' feet1,163 feet1,093' feet1,324' feet–
Min Elevation233' feet232' feet231' feet223' feet–

Course & location

Lake Sonoma, CA

Directions
Sonoma Fall Classic course mapCourse map
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Sonoma Fall ClassicOctober 2027 · date TBA · Lake Sonoma, CA

Entry fees

Prices go up as race day gets closer; register early.

Until 3/31Until 8/31Until 10/12Race Week
100 Mile$375$405$435$465
50 Mile$195$215$235$255
Marathon$145$160$175$190
Half Marathon$95$115$135
100 Mile Relay$380$400$420$440
50 Mile Relay$280$300$320$340

Prices don't include tax or registration-platform fees.

Past editions

1 editions since 2026, 0 finishers.

  1. 2026
All results
See you on the start line

October 2027 · date TBA