Rabbit Valley is on the Colorado/Utah border. There is lots of pinyon, juniper, sage, and slick rock. There are some great views of the La Sals and the Colorado River. The area is popular for OHVs and mountain bikers. Good rabbit hunting also abounds. Castle Rock is also climbable out there.
Take exit 2 on I-70. This is on the other side of the interstate from Trail Through Time.