Gondola Servizio. Rides in authentic gondolas that seat up to six depart from downtown Napa's municipal dock along the Riverfront Promenade. You'll never mistake the Napa River for the Grand Canal, but on a sunny day this is a pleasant excursion. Main Street Boat Dock, 680 Main St., Napa, California, 94559. 707/373–2100; gondolaservizio.com.
Enjoy Napa Valley. Napa native Justin Perkins leads a history-oriented Napa River kayak tour that passes by downtown sights. On the easy paddle, Perkins points out the wildlife and regales participants with amusingly salacious tales of Napa's river-town past. Enjoy Napa Valley also rents paddleboards. Main Street Boat Dock, 680 Main St., Napa, California, 94559. 707/227–7364; enjoy-napa-valley.com. $71.