Mason Neck State Park is one of the Virginia 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
Mason Neck State Park is in Fairfax County, Virginia. Its approximate coordinates are 38.64851, -77.18151.
Check in at Mason Neck State Park
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.