Following the South Fork of the San Miguel River, South Fork Illium Road is a dirt road alternative between the tiny towns of Lime and Ophir, just west of Telluride, Colorado. The road passes through the South Fork Preserve and offers incredibly rich fall color viewing. This road is best known for being the start of Section 2 of the Colorado Backcountry Discovery Route (COBDR), a mostly off-road route across the entire state of Colorado from New Mexico to Wyoming.