For more summertime water fun at Tahoe, join the animated crowds of summer vacationers who rent rafts in Tahoe City for a two- to three-hour, five-mile float down the scenic Truckee River to River Ranch Resort, where a shuttle will return you to your vehicle. Yes, the waterís cold, but on a warm day it's delightfully invigorating. The regulated, Class I flow moves slow and easy, and there are plenty of spots where you and Rover can pull over for a swim. Truckee River Raft Co. counts dogs as regular customers. Just be aware that canines aren't allowed on the patio at River Ranch, which attracts a lively crowd on summer afternoons.