This was indeed intended as a horse trail, as severe erosion at certain points attests. I have yet to meet up with horses along this trail, but have found track of deer, cats, and dogs in the soft trail bed. This trail eventually comes out on the beach, depending on where you want to slide down the dunes. T he further south on the beach one goes, the more narrow and steep the beach becomes. Caution is therefore advised.
Waves can come up very quickly.
One time last winter the waves almost got me. Be especialy cautious when walking near the edge of sand ledges. There are no restrooms, picnic tables, nor any improvements other than the compulsory notice board. Park in an unmarked pullout immediately north of the bridge and hike towards the miniature dunes following the line between the estuary to the left and jumbled masses of flotsam and brush to the right. Cross the dunes to the beach, then explore to your feet's desire.