From jct Hwy 56 & Hwy 58: Go 3 mi SW on Hwy 58 (Niumalu).
No clean restrooms and a lot of homeless be aware of your valuables.
There were no signs jndicating a city curfew at the park so me and a friend of mine got a ticket. I was told afterwards that the curfew was at 9:30 pm. Anyway Honolulu residents should be proud of themselves for maintaing a cordual and friendly relations with visutors under the extreme conditions of Covid-19 and protest. I will be back.
I visited this park when it was high tide, so the only visible sandy beach area was actually in the canoe club next door, and it was very small, like 10 feet wide. Rest of the bank was either filled with native plants, or with volcanic rocks. The river that ran by the beach is kind of smelly and muddy, so swimming is definitely not advisable. A few homeless looking people with their belongings were scattered around the park sleeping, so a visitor like me look out of place.