If you're looking for an alternative to the Waipi'o Valley Overlook (which tourists ... approximately half-mile hike down the Pololu Trail that leads to the ocean and a black sand beach.
The Hamakua Coast stretches roughly 50 miles between the towns of Hilo and the Waipi'o Valley ... into Waipo'o Valley is possible, the cliffs make for a rather difficult hike (just something ...