We took a pretty good hike along the Manana Trail.  The trailhead was was in  Pearl City and ended up on a ridge that offered a great view of the Windward side.  It was a 10 mile trail up and back.  I thought it was a relatively strenuous hike.  I think we should have started earlier in the day to try and beat some of the afternoon heat.  Make sure you take plenty of water.  That goes for Hiking anywhere on the islands......
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