Trail Marathons in June
Long days and high trails. The mountain season is open.
June is when trail marathons head up. The Leadville Trail Marathon climbs past 13,000 feet in Colorado, and the Marathon du Mont-Blanc runs above Chamonix at month's end. Closer to sea level, June courses are green, long-lit and warm.
Count back from race day
- Early December: start the 10-week primer
- Early February: start the 18-week plan
- Late May: peak week
- Mid-June: race day
Your training season. The steadiest build of the year: late-winter base, spring climbing, a late-May peak. For a high race, aim for a few long runs at altitude in the last six weeks.
Masters Athlete Insights
Altitude hits older lungs and sleep harder than most expect. Arrive a few days early if you can, and walk the steep stuff early in the race.
Start the 16-week 50K plan · Not 26 weeks out yet? Begin with the 10-week primer.




