Dig out your daypack, make sure you have plenty of water and hike Makiki Trail. This popular route attracts hiking enthusiasts from all over.
Wandering around this trekking route won't cost a thing, which will be music to your ears if you're after free things to do. You'll find Makiki Trail in Mililani Mauka - Launani Valley. There are plenty more places to explore not far away, including Dole Plantation, Wahiawa Botanical Garden and Hawaii Loves Barbie Dolls Museum.