About halfway between Presidio and Terlingua, on the River Road in Big Bend Ranch State Park, the road takes a turn away from the edge of the Rio Grande. A small mountain range separates the highway from the water, but there’s a narrow slice through those hills at Closed Canyon. From the trailhead on the River Road, the hike begins with a trek across the dry desert floor. You’ll have to go down a small hill (and climb back up it on the return trip — something that’s more challenging than it should be, thanks to the intense heat that […]