Physical Start Box Registration Location: Safeway; 624 Highway 105; Monument, Colorado
GPS: 39.0983167, -104.8658246
After registration, drive approx 1/4 mile to start point at New Santa Fe Trail Hwy 105 Trailhead.

Elevation: 6,961 feet
Distance: 6K/10K/20K
Rating: 2B
Trailhead GPS: 39.097942, -104.870985

The elevation change is very gradual.
Elevation gain to Palmer Lake: UP 246 feet
Elevation loss to Baptist Rd: DOWN 210 feet
Of course, you have to return!

You can also start at the ends:
Palmer Lake Trailhead GPS: 39.123502, -104.910363
Baptist Road Trailhead GPS: 39.056717, -104.858009