Address: 3417 Crescent Rim Dr, Boise, ID 83706
Treasure Valley Dog Island in Boise, Idaho is a big off-leash park. It is surrounded by water, which acts as a natural barrier. The park has separate areas for large and small dogs. There is lots of space for dogs to run and swim. The park also has nice features like shaded areas and places to sit. However, some visitors worry about mud in winter and the quality of the water.