If you are planning to go to Great Sand Dunes National Park with your big rig, you will not fit in any of the campsites at the park's Pinon Flats campground. So I highly recommend staying at the nearby free San Luis Lakes State Wildlife Area. This former state park 15 miles from the national park has paved roads, long pull-thru and back-in sites, 50A electricity and a dump, but NO WATER. We stayed there last fall and it was uncrowded, quiet, and had great views of the snow-capped Sangre de Cristos.
For more on the route, campgrounds, and sights from Pueblo to Durango, see my blog HERE.
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2016 Rockwood Signature Ultra Lite 8244WS 5th Wheel; 2015 Ram 2500 4x4 CC-SB 6.7L CTD
Sold: 2012 Rockwood Mini Lite 2109S