If you were to continue driving past Honolua Bay for an hour, around the Northwest side of the island, you'd eventually get to the start of the Waihee Ridge Trail. The pros of that drive are a lot of beautiful valleys and views. The cons are tons and tons of switchbacks and narrow (but drivable) roads. The Waihee Ridge Trail itself isn't super hard - probably about 8km round trip, but goes through some dense jungle, then along a ridge with beautiful views (weather permitting). From the end of the trail, you can look Eastward along the coast.

Waihee Ridge Trail on Google Maps

Paia and Hookipa

To continue the tour around the island, you could keep going from Waihee Ridge trail through Kahului and you'll end up at Paia. It's a small, little town that is half surfers and hippies and half tourists.

While you're headed that way, check out Baby Beach. It's a massive, long white beach that is perfect for walking on and there is also a nice little swimming area.

Past Paia is a beach called Hookipa - it typically has lots of surfers, but if there are no waves it might be good for swimming.

If you're in Paia try eating at the Flatbread Company.

Hookipa on Google Maps

Baby Beach on Google Maps

Bamboo Forest Hike

A little bit past Paia - on the road to Hana - is a great little hike through a bamboo forest. There are streams, there are waterfalls. There is bamboo. Read the write-up here.

Haleakala - House of the Sun