Arapahoe open space dogs need leashes unless posted otherwise

A trail in Arapahoe County open space carries a lot of foot traffic, and the leash is what keeps all of it moving smoothly. Dogs must be on a leash on county open space, and the same rule holds in county parks. The one exception is a posted sign that spells out something different for that spot, such as a fenced area set aside for off-leash play.

The reasoning shows up the moment a dog is loose. A trail might run past grazing livestock, past horses that spook easily, or past another visitor walking a leashed dog who has no way to know yours is friendly. Even a gentle dog that bounds up to greet someone can knock a child over, send a horse sideways, or chase wildlife into a road. The leash takes those guesses off the table.

So the safe assumption on any Arapahoe trail is leashed, and you stay leashed until a sign tells you the rules have loosened. Read the signage at the trailhead rather than partway in, since an off-leash area is usually marked at its boundaries. When nothing is posted and you are unsure which way the rule runs, the leash is the answer that never gets you in trouble.