Take the Hana Highway and just before Hana on the left side of the road you will see a sign for the State Park. Park in there and its a 1 minute walk down to the water and you can't miss the jumping rock! Just be careful getting out to the jump, its on an island and getting up onto it can be hard if the water is rough.
Hana Highway State Park , HI United States
Hana Highway State Park