Is there a way to highlight a route along a road in Google maps instead of a point location. I'm trying to highlight this route.

The Three Sisters route starts in Medina, TX. From Medina catch RR337 (at this point you are starting on "The Three Sisters") heading west (right). Take RR337 west until you come up on the town of Leakey. At Leakey, go north on US 83 for a just about a mile and look for RR336 on the left. Take a left onto RR336 which will head you north. Continue north on RR336 until you meet Texas 41 and at this point you will want to turn left in order to head west. Go west for 15 miles or so and you will find RR335 on the left. Take a left (east) and get on RR335 and drive south down to Camp Wood where you can take a left on to RR337 and finish out the loop when you hit Leakey again.