The Darby Canyon Wind Caves are located near Alta, WY, within the Jedediah Smith Wilderness ("the backside" of the Tetons). This is a very popular trail, so don't expect to have any solitude - you'll constantly be pulling over to let others pass, even horses, and the parking lot is full by 10am on weekends. But don't let that stop you from visiting at least once! The Wind Caves are a really cool, local geological feature called the "Darby Formation" - a thick layer of 350 year old dolomite. Don't forget that this is still bear territory - even though this is a heavily used trail, always carry bear spray. The best time to visit is when the snow is gone so you can actually hike up into the cave, typically late June through September. Dogs are also allowed off leash, and older kids will enjoy this gradual trail.