Medano Pass Primitive Road is a sandy 4WD route on the Saguache edge of the Sand Dunes

Great Sand Dunes National Park and Preserve sits in both Alamosa and Saguache counties, and one of its roughest routes runs along that boundary. The Medano Pass Primitive Road connects the dunes area with the Wet Mountain Valley to the east, and much of it is anything but a casual drive.

The road has long stretches of deep, soft sand and crosses Medano Creek several times. The National Park Service says it is passable only in the warmer months and only with a high-clearance four-wheel-drive vehicle. Standard cars, vans, and most all-wheel-drive crossovers can get badly stuck. Many drivers let air out of their tires for the sand, then re-inflate later. Plan on a slow trip; crossing the whole road takes hours, not minutes.

There is a reward beyond the challenge. The route climbs through good habitat for bighorn sheep, and roadside camping is allowed only at numbered sites inside the preserve. The road can open by late spring and stay open into fall, but creek levels, sand, and weather change what is safe day to day.

This is a real backcountry road with no quick exit if you get stuck. Check current conditions, vehicle rules, and any closures on the National Park Service Medano Pass Primitive Road page before you commit to it.