Grande Ronde River: Boggan’s Oasis to Snake River (Heller Bar) Professional Review and Guide
"Below Boggan’s Oasis, the canyon becomes increasingly arid and devoid of coniferous forest. Semi-desert vegetation, characterized by hackberry trees and prickly pear cactus, become common. This river run is not known for its inviting campsites.
Overnighters in the canyon rarely fail to encounter a rattlesnake, scorpion, or black widow spider. At low water, a few class 2 rapids occur. At high water, several class 2 and 3 rapids accompany and some very large, powerful eddies. The Narrows, class 4, is toward the end of the run and is considerably more difficult than the other rapids. The Narrows is located 21.4 miles from the put-in or 5.5 miles below Slippery Creek, a major tributary that enters from the left. The approach is marked by a big natural X-like form on the left, one bend above the rapids. Some imagination must be used to see the X Look a little above eye level on an open hillside near the apex of the bend. The appearance of powerlines as the river bends right warns of The Narrows below. Character: valley desert."