10.5 miles, 4 miles on gravel which is either loose or potholed, depending on how recently it was graded. The first 7 in a lightly-travelled rural area, then 1 mile through a small town (though the commuter traffic is heavy sometimes), then the last 2 miles on a fairly busy road that goes between the town and the expressway.
Takes 20 minutes in a car, 32 to 40 on a bike depending on traffic/headwinds.