St. Anthony Sand Dunes, Idaho: A UTV Dune-Running Guide

The Run

St. Anthony is a different animal. No rocks, no ruts, no trees to thread. Just an open ocean of white quartz sand stretched across about 175 square miles of eastern Idaho high desert. You don't follow a trail here. You read the dunes and pick your own line.

The big draw is the playground in the middle — rolling bowls, steep faces, and a few named monsters that locals have been climbing for decades. Choke Cherry is the one everybody talks about. It's tall, it's steep, and it humbles people every weekend. Around the edges you get mellow rollers that are perfect for warming up or letting newer drivers find their feet.

This is UTV and side-by-side country first and foremost. Quads love it too. Full-size rigs can play, but the dunes reward light, nimble machines that float instead of dig.

Difficulty & What You Need

Call it Moderate, but the dunes don't care about labels. They punish bad prep more than bad driving.

• Paddle tires. If you're serious about climbing, run paddles on the rear. Standard knobbies will spin and bury you on the steep stuff.
• Air down. Sand is all about flotation. Drop your pressures way down — many dune runners go into the low single digits up front and a little more in the rear. Start conservative, watch how the machine floats, and adjust. Carry a pump and a reliable gauge.
• A whip flag. Non-negotiable. The bowls hide machines until you're right on top of them. A tall safety flag is how the guy cresting the next ridge knows you're there. Most managing agencies require one.
• Recovery gear. A strap and a buddy. Getting stuck in sand is normal, not a failure. Don't go alone.

Keep your momentum on the climbs and never crest a dune blind — sand can drop off vertically on the back side. Approach unknown ridges slow and at an angle.

Best Season

May through October is the sweet spot. Spring and fall give you cooler sand and friendlier temps. Summer middays get brutal — the open desert bakes and the sand radiates heat, so ride early and late and hydrate hard. Wind reshapes the dunes constantly, so the faces you remember from last trip may not be there this trip. That's the fun of it.

Getting There & Access

The dunes sit northwest of the town of St. Anthony in Fremont County, with the main staging and camping areas reached off the county roads heading out of town. There's developed camping near the primary access point, plus dispersed options.

This is public land managed by the BLM. Idaho requires off-highway vehicles to be registered or permitted to ride here, and rules around flags, spark arrestors, and registration get enforced. Check current BLM access, registration requirements, and any seasonal closures before you load up — don't take a forum post's word for it, and don't take mine.

Ride It Right

The sand looks indestructible, but the desert around it isn't. Stay in the open riding area and off the vegetated edges and dune margins where plants are holding the whole system together. Pack out everything, including the stuff that blows out of your machine. Keep your noise and your speed in check around camps. We share this place with families, and the reputation of every wheeler rides on how the loudest one behaves.

Why It Earns Its Name

St. Anthony earns it because it asks something of you every single time. There's no marked easy way up Choke Cherry. You commit, you read the sand, you climb — or you slide back down and try again with more respect. It's pure, it's humbling, and it's some of the best sand riding in the country. Air down, flag up, and go find your line.