Schmitz is a predominantly rough dirt loop around the northern Schroeder Trailhead area. It is located about five miles west of Rapid City and can be accessed via the Schroeder Trailhead, off Nemo Road, or the Shanks Trailhead, off Highway 44. Schmitz contains two spurs off the east side of the loop, which terminate in clearings with no major points of interest.
Schmitz features mostly rough dirt with small embedded rocks. The northern portion of the loop, marked as 6605, features two areas of greater difficulty. To the east of the Flat Nasty rock-crawling trail, there is a ravine with steep banks on either side. Next to this ravine lie the remnants of the bridge that once crossed it. To the west of Flat Nasty is a narrow, rocky section that requires moderate clearance and careful tire placement. Pay attention not to enter Flat Nasty by mistake, as it is also marked 6605 and parallels the main trail. The sign for Flat Nasty can be found on its northern end, but is not present on its southern end. Schmitz is often damp and prone to mud, with frequent puddles up to axle deep.
Schmitz offers no designated camping areas. Dispersed camping is allowed up to 300 feet from the road on all parts of Schmitz except for the portion marked 6605.