We've accomplished hiking the Koko Head Railway Trail several times before, in the past years. It's a short but steep incline type of hike with an appropriate nickname "The Ultimate Stairmaster." A bit challenging for creaky knees with over 1,000+ steps to the top which offers scenic view for its victors.
This day, we took the more mountainous climb up to a natural arch on the crater's rim. A fun, gusty birthday hike!