That depends on each individual hiker, the hours of daylight, etc. Trail varies from constructed trail to GPS bushwhack route in the Lower Buffalo Wilderness. A complete thru hike is difficult but possible with careful attention to all details, but hiking the longer segments is not unusual. It may take 10 to 14 days for 165 miles, for example. Continuous built trail is in place from Lake Fort Smith State Park to Hwy 65 at Tyler Bend, Buffalo National River or 180 miles.