Mountain bikers share the land with cows, so keep your eyes peeled for pies.
From the parking area, ride a hundred feet or so down a 2 track road and hang a left on the singletrack, you can't miss it. Follow the trail for roughly a mile and do the only water crossing on the trail. Hang a right up the hill at the only fork if you want to stay on the 5 mile loop, or hang a left at the fork if you want to tack on another 3 miles onto your ride.
Some of the turns are tight, but pretty tame for the most part, this is North Dakota, so there aren't any trees to run into.