Southwest of Denver and west of Bailey, there is a scenic dirt road, Twin Cone Road (aka FS 126) heading south along the ridge from Kenosha Pass for about 10 miles.
To reach the dirt biking at the Kenosha Pass trailhead from Denver, head west on US285 for 58 miles to the signed Kenosha Pass. Turn left heading south on FS126 for 0.25 miles to the signed parking area. Continue riding south on Twin Cone Road (FS126).
Overall, Kenosha Pass - Twin Cone Road is the 89th most popular dirt bike trail of all 93 dirt biking rides in Colorado.