Ko Olina Boardwalk, Kapolei

There is a lovely boardwalk that winds through grassy knolls at the lagoons of Ko Olina Resort Beach. It is popular with people taking morning strolls or runs. The views are gorgeous of the blue-green water, coconut trees, tropical plants, and white sand lagoons. You can start at any of the four lagoon parking lots or the shopping area with the Starbucks and Black Sheep Cream Company. It is a 1.5 mile stretch from the Starbucks shopping area, along pretty Olani Street, past the four lagoons, ending at the marina. Bring your swimsuit because you're going to want to jump in that enticing water!
At the shopping area, you can eat at Mekiko Cantina or Eggs n Things, or shop at Island Country Market, which is like an ABC store.

Directions

Ko Olina Resort is located at 92-1480 Aliinui Drive, Kapolei HI 96707. Follow the H1 Freeway toward Waianae. You will see signs to Ko Olina. Once you enter the resort, take any of the side streets marked with signs such as "Lagoon #2." At the end of the street there is a public parking area marked "shoreline park users parking." Parking is very limited so you have to come early to get a spot. When you reach the guard gate, you don't have to stop- you can just wave and drive through. 
There are clean restrooms.
There is also parking at the shopping area where Starbucks and Black Sheep Cream Company is located, but you have to be going to one of the stores to park there. 
There is a small fee to park.

Click on map for interactive view