Missouri Elephant Rocks State Park- near Graniteville/Southeastern MO recommended by Barb from WI - "very nice" 1 mile paved trail - "The main path around the rocks is not only paved for wheelchairs but has braille signage and interactive spots for blind people." - "At some spots where the path goes between rocks, a wheelchair 'detour' is available."  - per park website, "The most excessive slopes are at 9.3% for 37 feet and 10.2% for 20 feet.  At some points the trail pinches down to 28 inches wide, due to rock formations." - for more info go to www.mostateparks.com