Laid out in the 1960s, the tree-lined riverbanks of the Boise River protect 30 miles of vehicle-free trails. It personifies Boise's 'city of trees' credentials, with parks, museums and river fun.
The river is insanely popular for its floating and tubing. The put-in point is Barber Park 6 miles east of downtown. It's a 5-mile float to the take-out point at Ann Morrison Park. There are four rest-stops en route and a shuttle bus ($3) runs from the take-out point.
The most central and action-packed space on the Greenbelt, 90-acre Julia Davis Park contains the Idaho State Historical Museum with well thought-out exhibits on Lewis and Clark; and the Boise Art Museum. There's also a pretty outdoor rose garden.