Scree Sea to Sky Hiking Terms
Scree: from the Norse “skridha”, landslide. The small, loose stones covering a slope. Also called talus, the French word for slope. Scree is mainly formed from the annual freeze/thaw periods of spring and fall, where water seeps into cracks in the rock and expands when freezing. The scree slope shown here is near the summit of the iconic Black Tusk in Garibaldi Provincial Park near Whistler in British Columbia.
Scree slopes are a common obstacle or simply part of the scenery on alpine hiking trails. Wedgemount Lake pictured below is dominated by scree slopes and a massive erratic field around the lake.
The image below is an aerial video of Joffre Lakes Provincial Park. Scree slopes dominate the areas above the lake leading up to Joffre Peak as well as the glacier far above the lake.
The Joffre Lakes trail is surprisingly busy most of the summer, which is a testament to how extraordinarily beautiful, and relatively easy the hike is. Unlike Wedgemount Lake, Black Tusk or Cirque Lake, which are to difficult for many hikers, Joffre Lakes is comparatively easy and certainly relaxing. Many hikes in the nearby Garibaldi Park are not family friendly and easy, but Joffre Lakes is. Certainly the scenic drive to the trailhead from Whistler is part of the fun. The image below is an aerial video of the Fissile, Adit Lakes and Russet Lake, all surrounded by scree and scree slopes.
Black Tusk is the extraordinarily iconic and appropriately named mountain that can be seen from almost everywhere in Whistler. The massive black spire of crumbling rock juts out of the earth in an incredibly distinct way that appears like an enormous black tusk plunging out of the ground. Whether you spot it in the distance from the top of Whistler Mountain or from dozens of vantage points along the Sea to Sky Highway, its unmistakable silhouette is hard to miss.
Glossary of Hiking Terms Squamish Hiking Trails
Ablation Zone: the annual loss of snow and ice from a glacier as a result of melting, evaporation, iceberg calving, and sublimation which exceeds the accumulation of snow and ice. Located below the firn line. Firn originated from Swiss German and means "last year's snow". It has been compacted and recrystallized making it harder and more compact than snow, though less compact than glacial ice. An excellent place to see an ablation zone is Wedgemount Lake in Garibaldi Provincial Park in Whistler. The Wedgemount Glacier has been receding for decades. In the 1970's the glacier terminated with a steep and vertical wall of ice at the shores of Wedgemount Lake. Today the glacier terminates a couple hundred metres above Wedgemount Lake.
Accumulation Zone: the area where snow accumulations exceeds melt, located above the firn line. Snowfall accumulates faster than melting, evaporation and sublimation removes it. Glaciers can be shown simply as having two zones. The accumulation zone and the ablation zone. Separated by the glacier equilibrium line, these two zones comprise the areas of net annual gain and net annual loss of snow/ice. The accumulation zone stretches from the higher elevations and pushes down, eventually reaching the ablation zone near the terminus of the glacier where the net loss of snow/ice exceeds the gain. The Wedgemount Glacier in Garibaldi Provincial Park in Whistler is an ideal place to see an accumulation zone up close. From across Wedgemount Lake you can see the overall picture of both the accumulation zone and ablation zone of a glacier. The Wedgemount Glacier is also relatively easy and safe to examine closely and hike onto. The left side of the glacier is frequented in the summer and fall months by hikers on their way to Wedge Mountain and Mount Weart.
Aiguille: a tall, narrow, characteristically distinct spire of rock. From the French word for "needle". Used extensively as part of the names for many peaks in the French Alps. Around Whistler in the alpine you will find several distinct aiguilles. Black Tusk in Garibaldi Provincial Park could be called an aiguille, however its long and prominent history has given it another descriptive term of "tusk". You will find aiguilles on many hikes in British Columbia.
Alpine Zone or Alpine Tundra: the area above the treeline, often characterized by stunted, sparse forests of krummholz and pristine, turquoise lakes. The Sproatt alpine is an excellent example of an alpine zone in Whistler. Dozens of alpine lakes, rugged and rocky terrain and hardy krummholz trees everywhere you look. The hostile, cold and windy climate in the alpine zones around Whistler make tree growth difficult. Added to that, the alpine areas are snow covered the majority of the year. Other good places to explore alpine zones in Whistler are Wedgemount Lake, Blackcomb Mountain, Whistler Mountain, Black Tusk and Callaghan Lake.
Arête: a thin ridge of rock formed by two glaciers parallel to each other. Sometimes formed from two cirques meeting. From the French for edge or ridge. Around Whistler and in Garibaldi Provincial Park you will see dozens of excellent examples. Below Russet Lake in Whistler, the glacier at the bottom of the valley, below the lake has a wonderful example of an arête. The far side of Mount Price, near Garibaldi Lake also has an enormous arête. The Wedge-Weart Col beyond Wedgemount Lake is a prominent arête to the summit of Wedge Mountain.
Backshore: the area of the shoreline acted upon by waves only during severe storms. The West Coast Trail on Vancouver Island runs for much of its 77 kilometre length along a very distinct backshore route. Often visible are signs of winter storms that have recently dislodged enormous trees from the rugged coastline. A backshore can range from as little as a few centimetres high to hundreds of metres high. The backshore route along the West Coast Trail is often as subtle as a sandy beach edged by a slightly higher border of grass and forest. Other areas of the trail the backshore is a vertical, solid rock cliff with crashing waves cutting into it far below.
Bar: A ridge of sand or gravel in shallow water built by waves and currents. Tsusiat Falls along the West Coast Trail on Vancouver Island has an excellent example of a bar. An enormous and ever changing sand bar created from the waterfall meeting the Pacific Ocean. Often this bar is a dozen metres high and 400 metres long as it runs parallel to the ocean before flowing into it. Similar to a barrier beach, however a bar is more pliable and recent than a barrier beach, which tends to have long-term plant growth on it.