White water or calm rafting is a quite popular activity here in Alaska. The best period is from May until September because of favorable weather and rapid river streams. For an unforgettable experience take a tour on the Nenana River near Denali National Park, on the Kenai River, or near Talkeetna on the Talkeetna, Susitna, and Chulitna Rivers. Rafting tours in Alaska are relatively cheap, so such a water trip may be the perfect activity for a family weekend. Float down the river during summertime and enjoy your time on the water!