Welcome to the official Lost Boys 50 Mile Trail Run website! 

The Lost Boys 50 course is a rare point-to-point course that starts in the beautiful Anza Borrego Desert in San Diego county California at 1,100-foot elevation, tops off on Cuyamaca Peak at 6,512-foot elevation, and ends at Cuyamaca Lake in the Cuyamaca Rancho State Park. With nearly 9,000' of climb and 6,100' of descent the course really packs a punch.

This is a beautiful but extremely challenging run featuring spectacular geography, historical trails, contrasting landscapes and incredible views. The first half courses through desert washes, canyons and mountain valleys including a brief section where runners must climb over some dry rock waterfalls. Ascending out of the desert, the mountainous second half climbs and descends through a lush alpine environment.

There are approximately 28 miles of trails, 4 miles of desert washes without roads or trails, and 18 miles of jeep roads. All but 4 miles of the course is contained within the state parks. The course is marked well and the aid stations, spaced 4 to 8 miles apart, are run by veteran ultrarunners.

  • We are preparing to make a big announcement about the 2017 course. We plan to add between 1,000-3,000 feet of climb and descent - making the overall gain between 10,000-12,000ft. The route will be fundamentally the same just with some side pockets of peaks to bag! Sincerely, Lost Boys 50. 
  • 2017 Race date set for Saturday April 29, 2017 5:00AM start!
  • Congratulations to Angela Shartel, 2016 OVERALL winner of the 2016 Lost Boys 50 Mile Trail run (8:47:38) and to Gabe Yanez that won it for the men (8:54:33)!
  • Congratulations to ALL runners and a big thank you to the 60+ volunteers that made the race happen.
  • Complete results are now posted on Ultrasignup 59 starts and 53 finishers (90% finisher rate!).
Lost Boys 50 Mile Trail Run 2016 Winner Angela Shartel and Men's winner Gabe Yanez


In referring to his love for the Lost Boys 50 mile Endurance Run, course record holder Ben Hian said:  "I am so excited this race is coming back. There is something primitive about running from the desert to the mountains."

(Ben Hian enters the Pedro Fages aid station at the 2010 running of the Lost Boys 50, photo by Mary Gonzales)

Lost Boys 50 Mile Trail Run is Found

Drive east along Highway 78 past the old California mining town of Julian until you find a place called Pinyon Wash (call-box number 78-810 at elevation 1,100 ft); which is on the side of the highway in the middle of nowhere in the Anza Borrego State Park. Step out of your car, grab a water bottle, and set out on foot. Run along the dirt roads, through desert washes, and the open desert floor for several miles. When the trail runs out keep moving through the desert without trail. When you come upon the dry waterfalls do what any reasonable nomad would do – climb up and over them.  Continue heading west until you bump into the base of the Laguna Mountain range.

Make the 3,000 foot ascent into the mountains via the steep canyons known as Oriflamme and Chariot. Once on top weave through the single-track runnable trails across grassy fields and panoramic view of the remaining 16 miles of your adventure.

Look for the tallest peak in the area (Cuyamaca Peak at 6,512 ft) and of course head directly for it and climb it. On your way there pass the dormant Stonewall Goldmine and enjoy the canopy and smells of the tall pine trees. If the sky is clear you will see the Pacific Ocean from the peak.

Finally turn your attention to Cuyamaca Lake which is within your view below. Head downhill over rocky technical trail and dirt roads. Aim for the west shore of the lake where some food, friends, and a chair awaits you. Do all of this in under 15 hours wearing a bib and with the support of aid stations and you will have completed the Lost Boys 50 Mile Trail Run.

The LB50 was first run in 1991 and had four finishers (Mike Suter, Tom Waddell, Bud Willis, and Wes Barrett). The rare race has been loved ever since and has been run 9 times in the last 25 years.

 The course will be well marked with orange surveyors ribbon, especially the desert stretch. We at Cliffs and Meadows LLC are thrilled to again “Find the Lost Boys”.

See you on the trails.

-Brian Gonzales, Race Director

One of the many desert washes the Lost Boys 50 course goes through.