Rising to an elevation of 10,358 feet high in the Central Oregon Cascades, South Sister is the tallest and youngest of a trio of closely situated volcanoes known collectively as the Three Sisters. However, aside from its relative proximity to its other siblings, South Sister stands apart in at least two ways: it is the only one of the three which still has a perfectly preserved summit crater; and as North and Middle Sister are now extinct, South Sister has a relatively recent volcanic history, having last erupted no more than 2000 years ago, with even more recent smaller eruptions.
South Sister presides over a vast wilderness area in the outdoor recreational playground that is Central Oregon. Just half an hour's drive from the town of Bend, South Sister is scaled by ambitious hikers during the late summer months by way of a relatively nontechnical 6-mile trail that leads to its summit, the third-tallest peak in the state of Oregon. Winter conditions make an ascent of South Sister a more serious challenge after roads that access its trailheads are closed by snow, and only the most dedicated mountaineers attempt it during this time of year.
In 2001, advances in satellite radar technology revealed South Sister's ongoing activity and potential for future eruptions. A bulge of magma was discovered beneath the volcano, causing concern about whether South Sister would join Mount St. Helens in a modern-day fireworks show. While the magma distortion under South Sister has abated in recent years, scientists remain on alert as to whether this restless giant will one day reawaken.
I spent 15 years living in Central Oregon, and have made more than 25 successful climbs of South Sister. It is a beautiful and compelling mountain, and something of a personal icon in my life. I believe many outdoor enthusiasts in the Northwest have shared similar experiences on South Sister, and I am excited that it has been added to TinyMtn's collection of mountain models.
Text by D. Stockton
Model scale is 1:25000
Model measures 4.7" x 4.7" x 1.83" (12 x 12 x 4.7 cm)
Original area is approximately 1.86 by 1.86 miles
Altitudes covered: 7184' to 10358'
There is no vertical exaggeration applied to this model. This is a true-to-life scale model of a real place.
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for other 1:25000 models.
TinyMtn models are most affordable in the "Sandstone" and "White Natural Versatile Plastic" materials. This model is in "Sandstone," which is a glued gypsum material. When you receive the model it will be ready for display, though it may smell funny and need some time to air out. "Sandstone" models are much more brittle than "Versatile Plastic" models, but feel more like light stone. Do not soak it in water, though you can safely seal it with Polycrylic or a similar water-based clear spray sealant. Read more about this popular material here
All TinyMtn models have hollow bottoms - this is to save on weight, and thus cost. Many larger models also have extra flanges on their undersides to increase rigidity and strength. To make the model more solid, you should feel free to carefully pour resin into the bottom cavity, or glue a properly-sized slab of wood or another material into it.
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(C) 2016 TinyMtn (TM)
Model created using GDAL, NetPBM, Gmsh, Carve, MeshLab, and other custom software
Source of digital elevation and aerial orthoimagery data: U.S. Geological Survey
The USGS home page is http://www.usgs.gov/