Utah's Escalante River is a place of respite for outfitter Nathan Waggoner. “It really recharges the soul to be out on the river and fishing," Nathan says. "It's a nice, calming place to be." Nathan's appreciation for the Escalante's natural beauty drives his concern about the environmental threat posed by the invasive Russian olive tree, which overtakes native riparian species and alters water flow and temperature on the river.