This inaugural event in Jack London Historic State Park will take you through the heart of the Beauty Ranch that Jack London developed in the early 1900's. After writing famous works such as The Call of the Wild, White Fang, and The Sea-Wolf, he settled on the ranch, where he pursued innovative agricultural practices and continued writing, including his novel The Valley of the Moon.
Starting and finishing in the picnic area next to the London Cottage, the trail run takes you past the famous concrete silos, offering views of the vineyard and leading into the pristine hillsides filled with madrone, Douglas fir, black oak, buckeye, bigleaf maple, and grassy meadows on the slopes of Sonoma Mountain.
The following quotes from Jack London will give you a feel for his Ranch of Good Intentions: "Across Sonoma Mountain, wisps of sea fog are stealing the afternoon sun smolders in the drowsy sky. I have everything to make me glad I am alive. I am filled with dreams and mysteries."
"I am rebuilding worn-out hillside lands that were worked out and destroyed by our wasteful California pioneer farmers. I believe the soil is our one indestructible asset, and by green manures, nitrogen-gathering cover crops, animal manure, rotation of crops, proper tillage, and draining, I am getting results which the Chinese have demonstrated for forty centuries."
"I would rather be ashes than dust. I would rather that my spark should burn out in a brilliant blaze than it should be stifled by dry rot. I would rather be a superb meteor, every atom of me in magnificent glow, than a sleepy and permanent planet. The proper function of man is to live, not to exist. I shall not waste my days trying to prolong them. I shall use my time."
The event is limited in its participants so register TODAY!
Registration fees
Prices are inclusive of mandatory charges, items, and fees
Half Marathon - Youth
Price changes in 1 month 1 day-
(Age 17 and under)
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Register for Half Marathon - Youth$39.44
Early Bird Pricing
Now registering Feb 17 – May 1 -
$55.49May 2 – May 2
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5 Mile - Youth
Price changes in 1 month 1 day-
(Age 17 and under)
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Register for 5 Mile - Youth$28.74
Early Bird Pricing
Now registering Feb 17 – May 1 -
$44.79May 2 – May 2
-
Half Marathon - Adult
Price changes in 1 day 1 hour-
(Age 18 and over)
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Register for Half Marathon - Adult$87.58
Early Bird Pricing
Now registering Feb 17 – Mar 31 -
$98.28Apr 1 – May 1
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$108.98May 2 – May 2
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5 Mile - Adult
Price changes in 1 day 1 hour-
(Age 18 and over)
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Register for 5 Mile - Adult$76.88
Early Bird Pricing
Now registering Feb 17 – Mar 31 -
$87.58Apr 1 – May 1
-
$98.28May 2 – May 2
-
Course Map & Elevation Profile
Below is the Half Marathon Elevation Profile
Below is the 5 Mile Elevation Profile
COURSE CUT-OFF TIME: 3.5 HOURS ( ~16:00min/mile pace for half marathoners, ~42:00min/mile pace for 5 Milers). Hikers/Walkers are welcome to participate
Additional Details
ATHLETE CHECK-IN: If you received your bib in the mail, you do not need to check-in. If you need to pick up a bib or change your distance, you can do so from 6:30-7:45 AM at the start/finish area. Safety pins and course maps will also be available during athlete check-in.
COURSE MARKINGS: The course will be marked with orange ribbon. Do NOT assume that the runner in front of you is following the correct course.
AID STATIONS: Aid Stations at miles 3 & 9.6 for the half marathon. Aid Station at mile 2.5 for the 5 Mile. We highly recommend that you carry water.
INCENTIVES: T-Shirts for all participants. Personalized award ribbons to the top three finishers, male and female, in each age group for all distances which will be mailed out a few weeks after the race. Finisher medals for and Half Marathoners.
Medals Awarded to ALL Half Marathon Finishers.
BIB NUMBERS: Bib numbers will be mailed out to participants beginning two weeks before the event. If you do NOT receive a bib prior to race day, you will pick one up on race day morning. If you did not supply a valid mailing address when you registered, or if your mailing address has changed, or if you wish to run a distance different than the one you are registered for, please e-mail us at info@envirosports.com.
PARKING: Jack London State Park $10/vehicle. NOTE: There is no parking along London Ranch Road. Parking is very limited. PLEASE carpool as much as possible.
DRIVING DIRECTIONS: Directions and Parking Fees
CANCELLATIONS: Registrations are non-refundable and non-transferable. Here are the policy Terms & Conditions of the Race Roster Enhanced Refund Protection Program. You cannot purchase it AFTER you have completed your checkout. Otherwise, if you don't purchase the refund protection, and you need to cancel, you can email us by April 2, 2026 to receive a rollover credit (the amount you paid minus a $20 fee) to use toward any future Enviro-Sports race.
HEADPHONES POLICY: Since parts of this race include very narrow trails with steep drop-offs along the course, it is imperative that runners can hear each other in order to pass safely, even if they are running at a slow speed. For safety reasons (and for the enjoyment of your fellow runners) headphones (and any other audio devices) are NOT allowed.
Travel & Accommodations
Event Headquarters
13740 Arnold Dr, Glen Ellen, CA 95442
Call to make reservations and to receive a discount when you mention The Call of the Wild Trail Run.
Event Partners
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Event schedule
- Sat, May 2, 2026 6:30 AM - Athlete Check-in
- Sat, May 2, 2026 7:50 AM - Pre-Race Announcements
- Sat, May 2, 2026 8:00 AM - Race Start
Contact information
- Event contact
- Enviro-Sports
- Phone
- +1 415-868-1829
- Website
- Visit website
