The 0.5-mile Turtle Point Trail is fully contained within the grounds of Caneel Bay Resort [1]. Nonguests must check in at the resort front desk, where you will be given a map and instructions on where to meet the shuttle that will take you to the trailhead. The trail circles Hawksnest Point [2], where there are convenient benches and beautiful views, and ends at Turtle Bay Beach.
Links:
[1] http://www.moon.com/destinations/virgin-islands/st-john/accommodations/north-shore/over-300
[2] http://www.moon.com/destinations/virgin-islands/st-john/sights/north-shore/hawksnest-bay