Last updated: October 22, 2020
Thing to Do
4WD Medano Pass Primitive Road
NPS/Patrick Myers
Current Conditions
Check current conditions of the road on the park website.
Overview
This is a rough 22 mile road connecting Great Sand Dunes with the Wet Mountain Valley and Colorado State Highway 69. Passable only in the warmer months and only with high-clearance 4-wheel-drive vehicles, it gives access to Medano Pass (elevation 10,040’) and Great Sand Dunes National Preserve. This road crosses areas of deep sand, traverses Medano Creek nine times, and passes through excellent habitat for bighorn sheep. Average driving time for the entire primitive road is about 2.5 - 3 hours. Reduce tire pressure to about 20 psi if the sand is dry and soft. A free air station is available near the south entrance to the road in warmer months between the hours of 7AM and 9PM. If you reduce pressure, you will need to reinflate using your own air compressor before driving over rocks in Medano Canyon. Drive through creek crossings slowly to avoid drowning your engine.
Mileage Chart
Set your odometer to zero at the western entrance of the primitive road to follow along with this guide.
0.0 End of Paved Road: start of Medano Pass Primitive Road.
0.2 Garden Creek: flows until mid-summer
0.5 Buck Creek: intermittent stream
1.0 Sawmill Creek: flows until mid-summer.
1.1 Point of No Return: 4WD vehicles ONLY past this point. Sand Ramp Trail access.
1.4 Ponderosa Point Picnic Area: view of Mt. Herard (13,297’) and dunes.
1.8 Sand Pit: DEEP SAND! Reduce tire pressure to about 20 pounds if sand is soft
2.6 Castle Creek Picnic Area: picnic tables, vault toilet. Park only in designated areas.
3.3 Horse Canyon: views of eastern dunes and foothills.
4.5 1st Crossing of Medano Creek: spring runoff can be very deep! Use caution.
4.6 Old Fire Road: closed to vehicles. 1/2 mile walk to ridge with good views.
5.0 Sand Ramp Trail: trail crosses road. Overnight backpacking permit required.
5.2 Park/Preserve Boundary: roadside campsites begin, numbered by mileage fromboundary. 8 campsites over next 0.3 mile.
5.6 2nd Crossing of Medano Creek
5.9 More Campsites: 2 campsites over next 0.5 mile.
6.1 3rd Crossing of Medano Creek: look for bighorn sheep in meadows and cliffs.
6.2 Herard family’s 1870s homestead site (only foundation remains).
6.4 4th Crossing of Medano Creek
6.8 5th crossing of Medano Creek: 4 campsites over next 0.9 mile.
6.9 Tight squeeze: narrow roadway, boulders on roadsides. Use caution!
7.2 6th crossing of Medano Creek
7.7 Crossing of a Tributary Creek
7.8 Two alternatives: left side usually best.
7.9 7th Crossing of Medano Creek: road steeper ahead.
8.4 More campsites: 1 campsite within next 0.3 mile.
8.6 Creek Crossing of a Tributary Creek.
8.8 Beaver Dams: long meadows, marsh, and beaver dams.
9.0 Three Cabins: burned in 2010 wildfire.
9.5 More Campsites: 6 campsites over next 1.5 miles.
9.6 8th Crossing of Medano Creek
10.6 Creek crossing of a Tributary Creek.
10.7 Medano Lake Trailhead: trailhead at end of short spur road.
11.0 Irrigation ditch: steep section ahead.
11.2 Medano Pass: elevation 10,040’ above sea level.
Medano Road Camping Information
Roadside camping is permitted only at 21 numbered campsites in Great Sand Dunes National Preserve beginning 5.2 miles from where the road begins near Piñon Flats Campground. These sites are indicated with a brown post and camping symbol, and are numbered by approximate road mileage from the Park/Preserve boundary to Medano Pass. Numbers in parentheses are approximate road mileage from Medano Pass down to the Preserve/Park boundary. Roadside car camping is only permitted in designated sites in the national preserve. Vehicle access to these sites is only available late spring through fall, depending on snow, creek, and road conditions.These designated sites are free of charge and first-come, first-served. All 21 sites fill on summer weekends.
Camping Regulations for Medano Road Campsites
- Camping is permitted in designated, marked sites only in the national preserve. No permits are necessary.
- Tents must be located within 40 feet of the front of the bear box at each site.
- Pets must be leashed or restrained at all times.
- Fires only in existing fire rings; put out completely with water. Gather dead and down firewood 4” or less diameter.
- No off-road driving. Vehicles must be highway-legal in Colorado. Park only in designated campsites or parking areas.
- Secure food, coolers, toiletries, and trash from black bears. Lock them in the bear boxes provided at most sites.
- All trash, including orange peels, egg shells and toilet paper, must be removed. Bury human waste 6” deep.
Fat Bikes
Fat bikes (mountain bikes with extra wide tires for sand) are permitted on the Medano Pass Primitive Road, both for day use and for overnight camping in Medano Canyon. Check current sand conditions before riding; if sand gets too soft and dry, travel may not be possible. Bikes are not permitted off-road. You will be sharing the road with vehicles, some traveling at higher speeds in order to make it through sandy sections. For your safety, listen and watch carefully for vehicles as you ride.
Details
Duration
1-3 Hours
You can turn around at many places along the road, providing flexibility in your trip. Plan on 2 1/2 to 3 hours to drive the entire 22 mile road between CO 150 to CO 69.
Activity
Auto Off-Roading
Be prepared to drive through soft sand, creek crossings, and rocky terrain. Watch for Rocky Mountain bighorn sheep in Medano Canyon, along with other mammals and birds. Drive the road in late September through early October to enjoy fall colors.
Age(s)
16-85
Pets Allowed
Yes
Pets are permitted on leash along Medano Pass Primitive Road, and throughout Great Sand Dunes National Preserve. Please clean up after your pet.
Activity Fee
No
Entrance fees may apply, see Fees & Passes information.
Location
Medano Pass Primitive Road
Medano Pass Primitive Road extends 22 rough miles between CO 150 and CO 69.
Reservations
No
No reservations are needed or accepted to drive the road or to camp in primitive campsites.
Season
Spring, Summer, Fall
The rpass typically opens by late May, and stays open through part of November. Check current conditions on the park website.
Time of Day
Any Time
Not recommended to drive this road at night due to soft sand areas, creek crossings, and rocky terrain.
Accessibility Information
This road is accessible by high clearance 4WD vehicle, but there are no places for wheelchair use along the road.
NPS