From the water at Kalua Koi on Molokai to the beach at the Maunalua Bay Beach Park bath house, a distance of approximately 32 miles.
Current Channel Conditions (via NOAA):
http://www.prh.noaa.gov/hnl/pages/zone.php?zone=PHZ116
Start Detail:
21N 11′ 24.7704′ – 157W 14′ 57.516
Finish Detail:
21N 16′ 54.5118′ – 157W 42′ 50.8716′