Living in the desert of central Washington, it can be easy to forget that we live in a state with over 3,000 miles of coastline. While the high volcanic peaks of the Cascades are visible from our backyard (and thus remind us of their presence daily), the damp shores of the Pacific remain out of sight and out of mind most of the time.
Our most recent summer trip took us all the way to Washington’s western edge for a short backpacking trip along the coast in Olympic National Park. Coastal backpacking comes with a few unique challenges. For starters, predicting the weather along the coast is notoriously difficult, in part due to the relative lack of surface weather observations over the eastern Pacific and Gulf of Alaska, where most of our storm systems approach from. This fact ended up rearing its head on the final night of our trip.
Perhaps even more importantly, safe coastal backpacking requires that you know how to read a tide chart. The Washington coast experiences a fairly large tidal range, up to 10-12 feet during certain parts of the month. That’s enough to make vast sandy beaches completely disappear. A successful trip requires acute awareness of the timing and magnitude of the twice-daily high and low tides. The coast features many headlands (rocky outcroppings that jut out into the sea, often without any sort of “beach” whatsoever) that can only be traversed when the tide is below a certain level. Getting the timing wrong can (at best) result in having to sit on the beach for hours waiting for the tide to go out or (at worst) getting trapped in a dangerous situation as the tide rises and cuts off your escape route.
As this would be our first coastal backpacking trip, we obtained a permit for a fairly short and straightforward route beginning at Rialto Beach, heading north past the famous Hole-in-the-Wall, and eventually camping for two nights on the beach near the Chilean Memorial, the site of a shipwreck that killed 18 sailors all the way back in 1920. The terrain along this section of the coast was quite variable, ranging from long stretches of soft, sandy beach, to the slightly more annoying cobble and pebble beaches, to large boulder fields and headlands that were somewhat difficult to navigate with a heavy backpack:
After a little more than four miles of hiking, we arrived at the small, unnamed cove home to the Chilean Memorial and found a campsite just above the high-tide line among large pieces of driftwood. This sheltered cove made for a relatively quiet and peaceful camp, as the myriad rocks and sea stacks just offshore caught the brunt of the surf, limiting the amount of wave action reaching the beach. We enjoyed watching the landscape of the cove change over the next few days as the mist and tides repeatedly swallowed up and revealed the sea stacks and small rocky islands. We quickly discovered that the largest sea stack (pictured below) was connected to the mainland via a rocky isthmus at low tide, and ended up hiking out to it one evening to look back on our campsite.
While we had our fair share of clouds and mist, it did clear up enough on one evening to reveal the night sky. The moon was just past full, so the Milky Way was only barely visible, but it was still fun to see the southern stars rise and set over the Pacific:
Our trip came just a few days after the full moon, meaning that the low tides were some of the lowest of the month. These so-called “negative tides” are the best for exploring tide pools along the coast, as they reveal a greater variety of sea squishies:
In addition to the living tidepool organisms, we also observed large quantities of dead jellyfish (at least three different species) washed up on the beaches, including several massive (~2 foot wide) lion’s mane jellies:
For our third and final night, the original plan was to hike most of the way back to the car and camp along Rialto Beach near Hole-in-the-Wall. Prior to departure, the weather forecast for this night had called for a fairly robust storm coming in off the Pacific. With an ailing tent that has become somewhat more, shall we say, permeable than one would desire, we briefly debated whether to just call it quits to avoid the chance of getting soaked. Surprisingly, we were able to get enough cell service on the beach to check an updated weather forecast, which showed a drastically reduced chance of rain and little precipitation expected. Consequently, we decided to stick with the original plan and set up camp in the trees at the north end of Rialto Beach. Our decision to stay was quickly validated as we observed a number of whales spouting and breaching throughout the afternoon just offshore.
12 hours later, at 3 AM, when I was emerging from the tent for the third time to re-secure our tarp and shelter in the face of driving rain, wind, and large, deafening waves crashing up against the bluff just a few feet from our tent, I wasn’t so sure. A great example of the fickle coastal weather I suppose, and a good character building experience as Calvin’s dad would say.
While intense, the storm was brief, and by morning the skies were clearing, making for a pleasant stroll down Rialto Beach back to the car. All in all, the trip was a refreshing change of scenery from our predominantly mountain-based adventures the rest of the summer!
The last destination on our Alaskan journey was the Kenai Peninsula and the town of Seward. After a few days respite from the wildfire smoke in Wrangell-St. Elias, it returned with a vengeance as we headed back to Anchorage and down to the the coast:
After baking in the heat of the Alaskan interior for the last week, the marine climate of Seward was a welcome change. We even had a bit of rain for one of the few times in our entire trip.
While temperatures in Seward we’re somewhat more mild, the coastal location meant the humidity was not. On our first day in Seward, we partook in a brutal hike up to the Harding Icefield in Kenai Fjords National Park. The hike itself was not abnormally difficult, but we were definitely not used to the combination of heat and humidity, leaving me feeling physically ill at several points during the slog up the mountain. The day had started off overcast, but as we climbed, the clouds evaporated leaving us with stellar views of the rapidly retreating Exit Glacier and the Harding Icefield from which it originates. An icefield is essentially a large mass of interconnecting glaciers. The Harding Icefield is the largest — and one of only four — remaining icefields in the United States. The Exit Glacier itself has retreated more than a mile in the last 200 years, leaving trees and other vegetation to begin re-occupying it’s former valley.
The white and blue ice of the glacier made for a stellar contrast with the lush green vegetation of the alpine zone:
The wet climate of coastal Alaska results in extremely heavy snowfalls, making this one of only a handful of places in the world where glaciers flow all the way down to sea level to meet the ocean. Known as tidewater glaciers, these glaciers exhibit complex patterns of advance and retreat that, unlike standard alpine glaciers, are not purely the result of variations in climate. While warmer temperatures or prolonged drought can certainly reduce their mass, the movement of tidewater glaciers is also subject to complex interactions between the ice, the geomtery of the ocean floor, and the depth of the water into which they flow.
On our second day in Seward, we took a water taxi into the heart of Kenai Fjords National Park and then kayaked to within about a quarter mile of the terminus of Holgate Glacier. Tidewater glaciers have a tendency to “calve”, in which large chunks of ice break off the glacier and fall into the ocean, necessitating a safe distance. Glacier “social distancing” if you will. It is not hard to find videos on YouTube of people getting too close to calving tidewater glaciers, with quite predictable results. From our safe distance, we observed and heard several calving events in the few hours we were kayaking around the bay, but unfortunately I was not adept enough at kayaking into position quickly enough to actually capture one on camera.
Our boat ride back to Seward through Resurrection Bay also resulted in sightings of sea lions, seals, puffins, and even two pods of orcas: an exciting end to the trip!
Up until a few days ago, I would have felt extremely confident saying that I’ve seen more fossilized sea snails in my life than I have real ones. After all, teaching a lab that revolves around sedimentary rocks for two quarters will put one in close contact with more dead gastropods than one ever thought possible. And when you spend a lot of time staring at multi-million-year-old fossils, it’s often easy to forget that lots of the little buggers have closely related relatives still trolling the high seas today.Just a few of the many, many, MANY different colored and patterned varieties of nucella lamellosa, the Frilled Dogwinkle
A few days ago though, I stumbled upon a sea snail breeding ground of epic proportions at a place called Point Whitehorn Marine Reserve. I had gone there with the express purpose of looking at rocks and I remain convinced that the snails made their dramatic appearance in order to force me to confront the inherent irony in going to a marine reserve to look at rocks. Near the low-tide line, a couple of bright orange striped shells grabbed my attention, sticking out marine creamsicles amidst the backdrop of drab green algae and seaweed, dull brown barnacles, and grey sky reflected in the waves. I soon realized that I was surrounded (in a benign and not even remotely threatening way) by hundreds upon hundreds of sea snails exhibiting a dazzling array of different colors and patterns.
Now, my knowledge of sea snail taxonomy is limited, but it appears that despite the disparate appearance of these snails, they are all part of the same species: nucella lamellosa, also known as the Frilled Dogwinkle or Frilled Whelk (if anyone has information to the contrary, please let me know). Most of the snails in these photos are smooth; they have lost their ridges or frills that normally run along the length of their shell. This is apparently a common fate of nucella lamellosa that choose to spend their lives in places like Pt. Whitehorn which experience very rough surf during the winter. The frills literally get worn away, not at all surprising when you consider that the shells are made out of calcium carbonate, a substance that in it’s crystalline form is only a we bit harder than drywall.
Many rocks were encrusted with dozens of the snails, varying in size from babies barely larger than a pea, to a few gargantuan snails nearly four inches long. This species hatches in late winter and early spring, so this is a good time to get a sneak peak at the next generation. A female sea snail can apparently lay thousands of eggs each year, although like most species who opt for quantity over quality when it comes to reproduction, only a small percentage survive to adulthood. In the case of nucella lamellosa, that number is estimated at a paltry 1%. Upon reading this, I realized in horror that the occasional sharp “crunch” heard from underneath my boots while I was taking these photographs was nothing other than the sound of my contribution to this rather depressing and morbid statistic. But with any luck, those shell fragments I (inadvertently) created will get weathered, transported, buried, and fossilized, eventually re-surfacing in the collection of some enterprising geologist a few million years from now, a fate that can only be described as THE ultimate honor for any ambitious gastropod.