Lake Sonoma 50 Mile

Trail Running covering 21 km to 100 km with up to 4,572 m D+ in Healdsburg (California, United States)

Location

Healdsburg, California, United StatesShow on map(38.6105° N, 122.8692° W)

Date & StatusDate to be announcedDate TBA

First edition2009

Elevation gainUp to +4,572 m

Lake Sonoma 50 Mile is an endurance sporting event in Healdsburg, California, US focused on Trail Running. First held in 2009, the event is an established fixture on the endurance calendar. It is part of UTMB Index Races. Key features include Lakes & Ponds, Nature & Off-Road, Mountain, High Altitude.

The race program comprises 3 competitions, including Trail 100 km (100 km, +4,572 m D+), Lake Sonoma 50 (50 km, +1,337 m D+), and 21 K (21 km, +713 m D+). The exact date for the next edition is currently open and will be announced by the organizer. Official race regulations, course details, and registration information are provided on the organizer's website (runlakesonoma.com).

Official website

Lake Sonoma 50 Mile in Healdsburg (Work: "Alpine Ridge Trail Top Rocky Mountain NP 2024", Photo: Larry D. Moore, License: CC BY 4.0, Source: Wikimedia Commons) — "Alpine Ridge Trail Top Rocky Mountain NP 2024" · Photo: **Larry D. Moore** · Wikimedia CommonsCC BY 4.0
Cropped to 16:9 (960 × 540 px), WebP

Event characteristics

Lakes & Ponds Nature & Off-Road Mountain High Altitude

Races & distances (3)

Competition	Discipline	Distance	Elevation gain	Altitude range	Course type	Course & profile
Trail 100 km	Trail Running	100 km	+4,572 m	1,150 m - 3,070 m	Loop course	Route & profile
Lake Sonoma 50	Trail Running	50 km	+1,337 m	1,153 m - 1,715 m	Loop course	Route & profile
21 K	Trail Running	21 km	+713 m	1,156 m - 1,455 m	Loop course	Route & profile

Course & Elevation Telemetry

Course route & map

Distance

100 km

Elevation gain

+4,572 m D+

Elevation loss

-4,572 m D-

Altitude range

1,150 m - 3,070 m

Gradient (Avg / Max)

9.1 % / 16.4 %

Course format

Loop course

100 km+4,572 m D+Peak 3,070 m

Start (S)Finish (F)DownhillFlatClimbSteep

Elevation profile & course telemetry

Altitude from 1,150 m to 3,070 m above sea level (+4,572 m D+, -4,572 m D-)

Peak: 3,070 m·at 43.6 km·Ø 9.1 %

Event Information & Answers

Frequently asked questions (FAQ)

When and where does Lake Sonoma 50 Mile take place?

Lake Sonoma 50 Mile takes place in Healdsburg, California, US (start area at coordinates 38.6105° N, 122.8692° W). The exact date for the next edition is currently open and will be announced by the organizer.

What races and distances are offered at Lake Sonoma 50 Mile?

The race program comprises 3 competitions, including Trail 100 km (100 km, +4,572 m D+), Lake Sonoma 50 (50 km, +1,337 m D+), and 21 K (21 km, +713 m D+). The competitions belong to Trail Running.

What is the course layout and elevation profile for Lake Sonoma 50 Mile?

The main competition (Trail 100 km over 100 km) is designed as a loop course featuring +4,572 m of elevation gain and -4,572 m of elevation loss, ranging between 1,150 m and 3,070 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.

Where can I find registration and official race rules for Lake Sonoma 50 Mile?

Official race regulations, course details, and registration information are provided on the organizer's website (runlakesonoma.com).