There's a variety of trails; the bridge comment is correct, though if you want something more substantial, cross the bridge, head west to the stone trail marker and then turn south for a more substantial single track trail.
An hour is the average trail walk
You have a few choices of direction. You can take a 20 minute walk to the bridge or go towards the falls for an hour trip. Really up to you.
10 min. to bridge....uphill heavy. Multiple splits. A whole day can be spent if you enjoy it and swim. Can power walk most trails in about 2 hrs.
Sorry, I'm unsure, we didn't hike the trails, just went to take our boy for some splashing around in the water...
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