Chugach Avalanche GIS data in Google Earth KMZ format

The KMZ file below contains GIS layers for two feature types: Avalanche accident locations and weather stations for Southcentral Alaska. Both these layers are hyperlinked to official/media reports and live weather data respectively. 

Instruction to use KMZ file:

1. You will need Google Earth installed your computer. It’s easy.

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2. Next, download the .KMZ file to your computer.

Download the .KMZ file now »

If you already have Google Earth installed, simply open it and drag the .kmz file onto its interface. Or you can right-click on the file, pick “open with…”, choose Google Earth. Then double-click the .kmz file which should open Google Earth and then zoom to the data. Users should see “Chugach Avy Data” in the Temporary Places folder.

Avalanche Accidents with Fatalities (1952-2014)

This map displays data points well culled from various volumes of the “Snowy Torrents”, the database and local media sources. In some cases the exact location of the point may be off as much of the spatial information was anecdotal. The basic idea one gets from this map is that there have been many avalanche deaths in our area in recent history. We are unfortunately ranked 2nd in the country in avalanche fatalities in the last 60 years. Click here for a larger map »


Slope Map in degrees for Glacier Ranger District advisory area.

This slope map was generated from the National Elevation Dataset (NED). The source data is essentially a grid of elevation points every 60 meters. Unfortunately, Alaska has very coarse elevation information. As the gird spacing increases, slope calculations are artificially smoothed by the algorithm used in the GIS software. Despite this, the bottom line is lots of red on the map, which means our terrain is ideal for producing large catastrophic avalanches. Play it safe by recreating on more gradual slopes!

Turnagain Pass – Common Names Maps

motornamesDownload Motorized Side Map »

wennonmotorDownload Non-Motorized Side Map »

Summit Lake Area – Common Names Maps


Download or view the map now »

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