Like the Salal Trail, the Stengel Beach Public Access Trail is a little hard to find. To access the Stengel Beach Trail you turn off of Highway One onto Wild Iris at mile marker 53.96. You will then see the pay station and parking on the right. This is a very short trail with a big pay-off with enough rain - a waterfall!
Below is the sign that you will be looking for at the entrance.
And here is a portion of the easy trail out to the bluffs.
Looking down over the waterfall and over Stengel Beach. Bring a coat! It can be very cold on the bluffs.
To learn about the beautiful Salal Trail, here's the link: http://www.mendonomasightings.com/2012/01/30/how-to-find-the-salal-trail-a-hidden-gem-of-a-trail-on-the-sea-ranch/