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The glowing emerald of Treasure Valley began as an ambitious plan in the 1960s to prevent development in the Boise River's floodplain and provide open space in a rapidly growing city. Now, the growing collection of parks and museums along the tree-lined river-way is connected by over 30 miles of multi-use paths, and hosts an insanely popular summer floating scene. A developing $12 million whitewater park, complete with hydraulically controlled waves, promises to be the largest of its kind.
The put-in point for tubing the river 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 regular shuttle bus ($3) takes you back to your car from the take-out.
The most central and action-packed space on the Greenbelt, 90-acre Julia Davis Park contains the Boise Art Museum and is the permanent location of the Idaho State Historical Museum (temporarily closed for renovation).