This is a nice route to ride when you just want an easy day, as it’s relatively short (~30 miles), and stays in the flats. Keep in mind, of course, that in the Front Range, even “the flats” have a few small hills.
The topos below show the route starting from my house. Once you get back to town near the end, the topo shows staying on Prospect Rd. the whole way because I was too lazy to show the little maze through the CSU campus and Old Town that I ride to get back. I don’t recommend riding on Prospect if you can help it due to the high amounts of traffic.