The Rock Trail is not called the Rock Trail for nothing. After a short walk, you see a gigantic rock overhang, and you think: “Oh, that must be it, cool”. But it gets better. As the trail unfolds, you see one amazing formation after another, each a bit different. It is a geology museum that raises many questions for the non-geologist. In one place, a layer of pebbles was clearly visible embedded in the sandstone. The water was dripping down and eroding the area, and under the rock was an area of pebbles, apparently derived from the eroded rock. The pebbles must be older than the sandstone, and where are they from ? In another location, large rounded cavities (tafoni) in the sandstone were visible, like giant bubbles of mysterious provenance. In several places, one could see large rocks still part of the wall but clearly destined to fall off the rockface in the future millennnia. And beyond the rockface, the trail enters a giant’s playground of moss-covered rocks that indeed must have fallen off the rockface in prior eons. Everywhere, admire the life forms clinging to the rock and taking advantage of the drip paths of life-giving water – many colors of moss and algae, ferns, trees and other plants.
WTA’s trailbuilding here is truly astounding. The stairs go down an almost vertical slope for hundreds of feet, leaving one to wonder how the heavy lumber could even have been carried here, let alone put in place so perfectly.
Try to leave 30 min time after your hike to explore the special geologic features and beautiful view from the beach at Larrabee State Park. Drive into the park entrance on the seaward side of SR11 close to the north end of the park. Follow signs to the beach and park in the parking lot at the end. Walk a few hundred feet over the lawn to the band shell (dated 1915, the year the park was founded), and note the signs to the beach. Leaving the band shell on your right, turn left and pass through a tunnel with wildlife murals that passes under the railroad tracks. Turn right as you emerge from the tunnel and in a few hundred feet you are on the beach. Walk north a little bit to see the honeycomb rock formations described in Dave Tucker’s book “Geology Underfoot in Western Washington”.
Dave Tucker answers many of my questions about the geologic features of the Rock Trail and honeycomb weathering in the links below but for a full description of honeycomb weathering see the book.