The Lake Sonoma Relentless is a prestigious annual race held in the stunning wine country of California, offering a 50-mile ultra-marathon, a marathon, and the Trail Sisters Half Marathon. Known for its rugged and technical terrain, the event takes participants on a scenic journey through the trails surrounding Lake Sonoma, providing breathtaking views of the lake, vineyards, and rolling hills. The race is a favorite among elite endurance athletes, with a cash prize purse for the 50-mile and marathon races, and it also includes a unique "Elite" division for both men and women. The event emphasizes inclusivity and community, with pacers and a festive post-race celebration.
Race Date:
12 April, 2025
With a demanding 3022-meter elevation gain, the TERREX Lake Sonoma Ultra 50 Mile challenges runners through the rugged trails of Lake Sonoma, offering both stunning scenery and relentless climbs. Happening on April 12, 2025, this race, organized by the Healdsburg Running Company, attracts elite ultrarunners looking to test their endurance on technical trails near Healdsburg, California.
Weather based on historical averages.
With a demanding 3022-meter elevation gain, the TERREX Lake Sonoma Ultra 50 Mile challenges runners through the rugged trails of Lake Sonoma, offering both stunning scenery and relentless climbs. Happening on April 12, 2025, this race, organized by the Healdsburg Running Company, attracts elite ultrarunners looking to test their endurance on technical trails near Healdsburg, California.
The TERREX Lake Sonoma Ultra 50 Mile is 80km long.
The TERREX Lake Sonoma Ultra 50 Mile takes place in Healdsburg, California, USA.
The TERREX Lake Sonoma Ultra 50 Mile elevation gain is 3022 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
With a demanding 3022-meter elevation gain, the TERREX Lake Sonoma Ultra 50 Mile challenges runners through the rugged trails of Lake Sonoma, offering both stunning scenery and relentless climbs. Happening on April 12, 2025, this race, organized by the Healdsburg Running Company, attracts elite ultrarunners looking to test their endurance on technical trails near Healdsburg, California.
The TERREX Lake Sonoma Ultra 50 Mile is 80km long.
The TERREX Lake Sonoma Ultra 50 Mile takes place in Healdsburg, California, USA.
The TERREX Lake Sonoma Ultra 50 Mile elevation gain is 3022 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
Running
Nature
Altitude
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Lake Sonoma Relentless or Healdsburg Running Company. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Lake Sonoma Relentless website.