Part 1: Polo Beach to Highway 37
The route follows the (pretty much nonexistent) Old Makena road. Potentially useful waypoints:
N 20° 40.32 W 156° 25.642 gate 1
N 20° 39.919 W 156° 25.364 gate 2
N 20° 39.744 W 156° 25.189 gate 3
N 20° 38.948 W 156° 24.654 better road
N 20° 38.723 W 156° 24.585 1298 ft gate 5
N 20° 38.628 W 156° 23.763 leaving hwy 37