In Montana, it is completely legal to run ATV's, dirtbikes, horses, and the
like in the ditches along the highways. This has actually created a rather
vast network of singletrack trails in the highway ditches. While rather flat in
most places, they stay snow free and so are ideal for getting in shape in
the spring time. The also do have several interesting spots, and offer some
opportunites to air over and off of driveways and the like. Ride from the bar
south down the swan highway until roughly the tip of the swan lake. about
there the singletrack dries up. Turn around and head back. Combine this
with the Bigfork ditch loop for about a 25 mile ride.
Head out of Bigfork on 209. Park at the bar at the junction of 209 and 83.
http://www.singletracks.com/item.php?c=1&i=3151