2025 Mammoth Trailfest 26K Race Recap: High Elevation, Big Views, and an Unforgettable Weekend

2025 Mammoth Trailfest 26k Race Recap

Running at 11,000 Feet: A Whole Different Challenge

The 2025 Mammoth Trailfest 26K was unlike any race I’ve ever run. Taking place in Mammoth Lakes, California, the race is gorgeous with epic climbs, summiting Mammoth Mountain at over 11,000 feet of elevation, an awesome crowd and cheer stations and support that was so incredible. I loved every moment of this race, except the altitude, which it turns out, my body does not love. Keep reading for my 2025 Mammoth Trailfest 26k race recap.

Perfect Weather for a Mountain Race

On Sunday, September 21, we were treated to absolutely perfect racing weather. Crisp mountain air, blue skies, and mild temperatures set the stage for an incredible day on the trails. Unlike some races where weather becomes part of the battle, this time the conditions allowed the terrain and elevation to truly be the stars.

The air quality had been iffy the last few weeks due to a nearby fire. Along with a storm that blew in Thursday and Friday, we were all holding out breath for good race day weather and we got lucky! 

Gorgeous Views From Start to Finish

One of the best parts of the Mammoth Trailfest 26K was the unforgettable scenery. From alpine lakes shimmering below to mountain ridgelines stretching as far as the eye could see, there wasn’t a single dull moment on the course. It’s the kind of race where you want to stop every five minutes to take a photo, but the challenge is remembering to actually keep running.

The First 5 Miles: Trail Running Bliss

The opening stretch of the course was pure joy for me. Rolling singletrack, wide-open views, and legs that still felt fresh made the first five miles my favorite part of the race. At this point, the altitude felt manageable, and I soaked in the beauty around me. I was living my best life and so happy. 

The Final Two Miles Up: Lightheaded and Nauseous at 9,000 Feet

While I loved the first 5 miles of the race, the last two miles of climbing were a completely different story. Once the course climbed above 9,000 feet again, I hit a wall. I felt lightheaded, nauseous, and like every step was a battle. That thin mountain air humbled me in a way few races ever have. I knew before hand that coming from sea level the altitude was going to be a struggle, but I haven’t done a lot of hard effort this high or really been able to train in a reasonable way. I knew what to expect, but actually doing it was another story. 

At about mile 6.5, knowing we had a mile more go to, I looked at my friend Brian, who I ran most of the race with and told him I didn’t think I could keep going. It was a combination of the altitude, feeling bad, and watching numerous people have pretty severe medical emergencies where the ski patrol was coming down to to help. From a man fainting and unconscious when we passed to a woman who had fallen and was completely bloodied from knees to head, it was serious up there and that definitely got in my head once I started feeling poorly. 

But we decided to take a break and just keep pushing. By the time we made it to the summit, I was feeling slightly better and soaked in the awesome crowds at the top - groups that would chant your name, a high school marching band, and a great aid station with everything you could think of, from PB&J sandwiches to fruit to pancakes to candy. 

The Second Half: More Uphill Than Expected

Looking at the elevation map before the race, the back half of the course appeared to be mostly downhill. In reality, though, there were more sneaky climbs than I anticipated. Combined with the technical trails—rocky footing, uneven surfaces, and sharp twists—the second half required more grit than I had planned for. 

I was hoping to make up some serious time on the back half, but given how I was feeling due to the altitude and the technicality of the trail, and other racers, it turned out to be more cruising on the way down. 

Incredible Support and Organization

What helped me push through those tough moments was the amazing organization of the Mammoth Trailfest team and the incredible support along the course. Volunteers, cheer squads, and fellow runners created an energy that lifted me when my body wanted to quit. Every aid station was well-stocked and efficient, and the course was clearly marked from start to finish.

The camaraderie on the course was unreal and made me want to check out more trail races. 

Beyond the Race: A Whole Weekend of Fun

The Mammoth Trailfest isn’t just a race—it’s a celebration of trail running. The entire weekend was packed with events, community, and connection. From meeting fellow runners, to enjoying the mountain town vibe, to soaking in the post-race energy, the weekend was as memorable as the race itself.

And it’s not just the 26k race, there was also a 2.4 mi “race” to the top (Look up the Dragon’s Back Ascent hike - it was the final 2.4 miles of the 26k). There was a 10 miler, a 50k, and of course the 26k. 

Final Thoughts on the Mammoth Trailfest 26K

The 2025 Mammoth Trailfest 26K challenged me in ways I didn’t expect—mentally, physically, and emotionally. Running at high elevation is no joke, and while the first five miles felt amazing, the final stretch up tested every ounce of grit I had. But between the stunning views, flawless organization, perfect weather, and supportive atmosphere, I can honestly say this was one of the most unforgettable races I’ve ever experienced.

If you’re looking for a race that combines beauty, difficulty, and community, the Mammoth Trailfest 26K should be on your list. Just don’t underestimate what it feels like to run above 9,000 feet!