This June marks the 10th Annual Mile High 25 on the Fly. What began as a wild idea in a Littleton fly shop has grown into one of Colorado’s most creative and unpredictable fly fishing events.

The idea was simple. Celebrate the species diversity of the Front Range and challenge anglers to go beyond trout. The result is two days of fast-paced, strategy-heavy, and often chaotic fishing that rewards creativity as much as skill.

How It Works

Teams of two anglers fish public waters on June 21 and 22. The goal is to catch and release as many different fish species as possible using only flies. There are 25 target species on the master list, each with a different point value. You get points for your first catch of each species. Catching duplicates does not help your score.

Fish must be documented and submitted through the tournament scoring app. You can fish from shore or boat, as long as you follow Colorado Parks and Wildlife regulations. You will need to adapt, think on your feet, and be ready for anything. Some teams have fished through snow, rain, and even tornado warnings.

Tips from Past Participants

Scout your spots before the weekend. Know what species live where and make sure the access is solid.
Don’t waste time chasing multiple species from one location. Catch what you can, then move.
Bring a versatile fly box. Include streamers, poppers, and panfish patterns, not just trout flies.
Use the right gear. A 5- or 6-weight rod works for most species, but it helps to bring a heavier option.
Plan your route and manage your time carefully. Have backups for your backups.
Stay organized and stay safe. Fishing is more fun when your gear is in order and your team is clicking.

Why It Matters

The Mile High 25 has always been about more than just points. It’s a celebration of community, creativity, and the waters we love. This year, a portion of every registration supports Denver Trout Unlimited and their work on the South Platte River.

If you’ve ever wanted to test your skills, meet great people, and support conservation all at once, this is your chance.

Join us June 21 and 22, 2025
Learn more and register at milehigh25.com