To Wichita Mountains:

Take I-44 (HE Bailey Turnpike) North....through Lawton to the Hwy 49 Medicine Park exit (North of Ft. Sill at the Love's gas station)

Go west on Hwy 49 into the Wichita Mountains Wildlife Refuge (watch out for buffalo!)....you will stay on Hwy 49, past Mt. Scott, past Holy City....go until you pass the Visitor's Center.  At the intersection on Cache Hwy 115....turn right and go past Quanah Parker Lake, past Doris Campground, until you see the sign for Lost Lake and Boulder Picnic Area. 

Turn left and go until the road ends into Boulder Picnic Area (at the restrooms)