The Poelua Gulch Trail in Wailuku, Maui is an easy 0.4 mile out-and-back hike down to the northern coast of Maui, just south of the Nakalele Blowhole Trail.
This secluded trail leads down to the Poelua Gulch which is a small cove that sits in a valley between two hills. At the shore's edge you can find a fishing spot and an old make-shift building made from drift wood.
Unfortunately a lot of trash from the ocean washing ashore at this cove, so there's plenty littered within the rocks along the coast at the end of the trail. The view of the water from the end of the trail is really nice and no one goes down there, so it's a nice break from the crowds if you're planning to hit the Nakalele Blowhole Trail too.