It's a 1-3 minute walk from the parking lot to the main landing area where the bridge is. You can choose to cross the bridge, take the stairs, and then walk the elevated scenic route which would take 10 minutes. If you choose to not cross the bridge you can walk alongside the water - that terrain is significantly flatter, and would be an easier 8-10 minutes.
From the bridge to water fall would be a 10 minute walk.
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