USFWS is one of the Montana parks in thicket's catalog. thicket is a field guide to the parks near you: it maps the ones you have never noticed, gives you a reason to actually go, and keeps a record of where you have been.
Where it is
USFWS is in Petroleum County, Montana. Its approximate coordinates are 46.92158, -108.47317.
Check in at USFWS
thicket verifies you are actually here by GPS when you check in, so a visit means you went. Checking in builds a streak, earns achievements, and fills in your map of the places you have been.