trail as quick as possible, and then just ride on the canal road. Go about 20 or 30 minutes depending on how I feel, and turn around. I usually catch it at about the 60 and Greenfield.
Edit once in maybe 2 months, I will make a big square and ride both canals, the second one being the paved one about 2 mi further west. I don't like doing that though, because it means coming home on surface streets.