Google Maps will show most fuel efficient route

[some_other_dave]

Agreed on Two Step for snorkeling. Bring a fiver for the local-church-run parking lot and save yourself a hike.

Kahalu'u beach park also has some decent snorkeling, including at times turtles. I know people who are advanced swimmers who swim out from beside the Sheraton (or whatever the hotel is now) at Keauhou, on the side nearest the marina. They regularly get photos of turtles, mantas, and more.

The night snorkel trips from the harbor there are awesome. There are usually giant manta rays that feed right under you as you lie there hanging onto a floating ladder with lights. Hopefully they're doing those trips again...

[JSH]

Originally Posted by Jonathan876

not very practical.

Google maps' eco routing? It has worked fine for me the couple times I've tried it since it became available. The app shows the fastest route and most economical route. In my case they time differences between the two has been a couple of minutes.