Maine Warden Services say Ashley Stone of Libson Falls was driving the sled along a powerline trail when she lost control and struck a tree.
Stone was pronounced dead at the scene.
Her passengers were two boys, also from the Lisbon area, ages 10 and 13.
Both were sent to the hospital with non life-threatening injuries.
One of the boys had a cell phone, and was able to call 911 for help.
Wardens say all of the children were wearing helmets.