The east side of Big Bend National Park drops into a green seam, and Rio Grande Village is the tiny settlement on the river where the Chihuahuan Desert finally gets a drink. Cottonwoods, reed beds and a campground sit in the floodplain, a store sells ice and groceries, and a few hundred metres away the Rio Grande slides past with Mexico on the far bank. The air smells of river mud and creosote, and in the evening there is a lot of birdsong. Southwest of here the Chisos Mountains hold the sunset, and to the east the Sierra del Carmen stands in the haze like a stage backdrop.
For a ride that follows the river road, this is a good place to set off from and a poor place to be unprepared. Treat the surrounding country as remote. The park has very few services, summer afternoons are brutal, and a breakdown on the unpaved track can mean waiting for a long time. Carry more water than seems necessary, tell someone your plan, and check the current condition of the road at a ranger station, because rain turns the clay washes to something unrideable. The track is gravel and dirt, with sandy patches, rock steps and creek crossings, so the right bike is a dual-sport and the right pace is slow.
There is a small hot spring a short walk from the road, where J.O. Langford, an early settler, built a bathhouse early in the twentieth century after moving here from Mississippi for his health; the stone ruins are still there beside the river and the water is warm year round. The old Boquillas Canyon overlook is nearby, where the walls close in and the river bends out of sight, and the road continues to the border crossing at Boquillas, which is a short rowboat ride and a legitimate way to have lunch in Mexico if you carry a passport.
Fuel is the thing to plan. Panther Junction, the park headquarters, is the reliable place for fuel, and you should top up there before heading out into the park interior.
October to March is the sensible season, with warm days and cold nights. The border country is wild and honest, and the quiet here is real.