GPSMap 66ST How to Point to Waypoint without roads

When out in a park I want to navigate to Waypoints without roads.

If I am on a trail it will give me only options to use the trail.

If not on a trail or if it can't figure it out, it gives me a calculation error.

One time I was on a trail and it gave me an enduring direction from my start point to the Waypoint  How do I get that back?