I'd say just over 2.5 miles, maybe 2.7 miles one way. A little over 5 miles total (out and back).
If you can get all of the way down to the trailhead it's maybe a mile...
Depends on where you park and start hiking. If you have a proper 4x4 vehicle with high clearance, you can probably make it pretty close to the actual trailhead. From there, I would say it's less than an hour, one way. If you start from where you turn off Crooked Finger, it's a 5.3 mi round trip.
The hike is less than a mile (one way) from the small parking area at the trailhead. A high clearance vehicle is recommended to get all the way there, as the road is full of jagged rocks and ruts. It's a very steep trail down to the falls (and back up). Lots of over and under logs, and a steep trail with a rope to help support your descent going down, and assent back up.
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