Barker-Ewing Float Trips has been running rafting excursions on the Snake River since 1963. The company is dedicated to safety, service and preserving the environment. All trips float within Grand Teton National Park and cover the most scenic stretch of the Snake River in Jackson Hole Valley. Trips float 10 miles and are roughly 3 hours in length. The best time of day to spot wildlife is early morning and late afternoon. Animal sightings aren't guaranteed. Family Travel Tip: The minimum age is 6; the minimum weight is 40 pounds.