The best ways to see the critters are by guided boat trips on the St. Lawrence and camping kayak trips ... of the Big Bend River through Santa Elena Canyon and the Great Unknown, giving visitors ...

Santa Elena Canyon’s walls are 1,500 feet of river ... There are a few too many rapids for a touring kayak; the river is a little too slow and draggy for a raft. Graceful, fast-moving canoes ...

The Rio Grande trickling through the Santa Elena Canyon in Big Bend National Park in March.Credit...Ivan Pierre Aguirre for The New York Times Supported by By Daniel Modlin Daniel Modlin is a ...