TravelOK.com:* Oklahoma Trails
^^I found this which give a little overview of each park that offers trails.
http://www.shopoklahoma.com/robbersc.htm
General info on Robbers Cave ^^
March 28-April 5 Robbers Cave Work Weekends, Wilburton, OK. Oklahoma Equestrian Trail Riders Association, Member Meeting 5 p.m. March 28 OETRA designated Adopt-A-Trail. Jobs on foot or from saddle. Bring tools. Chm. Carolyn Sinclair Cell 918-429-3488;
catbalou0012@yahoo.com, Asst. Chm. Harvey Sapp 918-371-8477.
^^ You may have wanted to know about this, I don't know if this falls in your travel time..figured you want to know though.