Flash flood shuts Medano Pass Road at Great Sand Dunes National Park

Late Tuesday afternoon, July 22, 2025, fast-moving thunderstorms sent a sudden surge of water roaring down onto the Medano Pass Road at Colorado’s Great Sand Dunes National Park.

The heavy rain triggered flash floods that washed out several sections of this 22‑mile route. Deep ruts and woody debris were left behind, strewn across the roadway. Park crews were forced to close the road between Castle Creek Picnic Area and the park boundary at Medano Pass for safety and repairs.

What’s closed, and what’s not

• Medano Pass Primitive Road: CLOSED as of July 23, 2025, due to washouts and debris. Crews expect to reassess repairs on Friday, July 25, once sections have had time to dry out.

• Castle Creek and Sand Pit picnic areas: OPEN, but only to high‑clearance, four‑wheel‑drive vehicles capable of tackling soft sand and creek crossings.

• Visitor Center, Dunes parking lot and Pinyon Flats campground: UNAFFECTED by the flash floods and fully accessible via paved park roads. Whether you’re rolling in an RV or towing a trailer, you can still explore the dune field, catch sunset views, and pick up souvenirs or trail info at the Visitor Center.

Tips for RVers planning a visit

• Stick to the paved loop. The primary park road, linking Highway 150 to the Visitor Center, dunes parking, and Pinyon Flats Campground, is paved and open year‑round. Plan your RV route along this loop to avoid any off‑road hazards.

• Campsites. Pinyon Flats Campground offers 26 sites (no hookups) on a first‑come, first‑served basis. If you arrive early in the day, chances are good you’ll snag a spot. Otherwise, consider nearby private RV parks in Alamosa.

• Check conditions daily. Before you head out, review the park’s “Current Road Conditions” page or call (719) 378‑6395 for the latest on Medano Pass repairs and other alerts. Park staff will update the site by Friday, July 25, with a projected reopening date.

• Pack for the unexpected. Summer storms can pop up quickly. Carry extra water, snacks, and gear for sudden weather changes. A basic roadside emergency kit, including tow straps, a shovel and traction boards, can turn you from stranded to self‑rescuing.

Despite the Medano Pass closure, Great Sand Dunes National Park remains a dream destination for RVers. You’ll see towering dunes, experience alpine trails, and enjoy star‑filled skies at night. Safe travels!

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