Keystone Ranch Golf Course is an 18-hole resort golf course in Keystone, Colorado, built in 1980 and designed by Robert Trent Jones, Jr.. It sits in the $$$$ (splurge) price range for golf in Colorado. The season runs May 25 to Sep 30. Tee times can be booked 7 days in advance. Guests are welcome.
Details like fees and seasons change, so call the course before you head out.