Do not filter or purify river water below here. A deep canyon with fantastic shapes in the basalt cliffs was the planned site of a dam, fortunately never built. 16.9 Horseshoe bend with many swallow's nests in the left bank cliffs. Dirt ranch roads become visible. 20.4 Grafitti warns you of a dangerous eroded diversion dam and falls ahead.
Swift water continues.
All guidebooks warn of the hazardous diversion dam and waterfalls below take-out. A short distance below there is a low-water crossing where most of the water goes thru tunnels in the concrete. You can find better put-in spots upstream between the highway and river. Even on Friday nights, campsites are often available at a USFS campground down a dirt road before the bridge. Shuttles are readily available by inquiring at stores in Markleeville.