There is a group that rides each Saturday starting at the prosperity bank on Rock prairie and hwy 6 at 730, and then picks up more riders at the entrance to Pebble Creek at 7:50. (Note time changed to the above a week or two ago).
Varying paces with multiple regroup points. The ride goes out and back on FM159 with stops in millican, Allen Farm or at Hwy 105 allowing distances of around 30+, 40+ and 50+
Usually around 25 riders.