West of Castle Rock in the Rampart Range area, the Flat Rock Motorized Traill #674 is a 4 mile route open to offroad motorcycle and ATVriding. This is a very popular and heavily used motorized travel route. Directions from Sedalia: Drive 10 miles west on Highway 67. Turn left (south) on Rampart Range Road.
This route connects with the Bar Motorized Trail #673.
To reach the trailhead from Denver, take Santa Fe (Highway 85) south to Sedalia, or from Castle Rock, take Highway 85 north to Sedalia. From Sedalia, take Highway 67 west approximately ten miles to Rampart Range Road. It is at the top of a hill and is well marked. Use caution as there is limited visibility of oncoming traffic. To the north is the Forest Service Indian Creek Work Center. Turn south on Rampart Range Road to access the OHV trails. The road begins here and runs south all the way to Colorado Springs. There are several parking and camping areas all along the way. Note that Rampart Range Road is not open to unlicensed vehicles. The Powerline (#690) and beginner trails (#627) parallel the road most of the way and can be used to get from one area to another if your bike is not licensed.
If you continue past Rampart Range road on Highway 67 about three miles you will come to the Sprucewood Inn. There is another small parking area just south of there with access to some of the more difficult trails. You can check in at the Sprucewood for trail maps, directions and some refreshment.
Persons approaching from the south may take Rampart Range Road from Woodland Park, or Highway 67 from Deckers.
Note: Colorado residents must register their off-highway vehicle with the Colorado State Parks (303) 866-3437. Non-residents are not required to register in Colorado, if they are registered in their home states. All off-highway vehicles must have an approved muffler and spark arrester. These requirements are subject to change so make sure to contact the Colorado State Parks prior to using your off-highway vehicle.
Overall, Flat Rock Motorized Trail is the 55th most popular dirt bike trail of all 93 dirt biking rides in Colorado.