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National Scenic Trails Added to US Topo Maps


National Scenic Trails Added to US Topo Maps

Just in time for late summer recreation, the newly released US Topo maps for Wisconsin feature the Ice Age National Scenic Trail. 

The Ice Age Trail, one of 11 National Scenic Trails in the U.S. and Wisconsin’s only State Scenic Trail, follows the edge of the most recent continental glacier as it traveled south through the upper Midwest. These parts of the state’s landscape are world-renowned as one of the best places to see the variety of landforms that resulted from glaciation. Several of the 1,109 new US Topo quadrangles display parts of the 640 miles of established Ice Age Trail segments, which are all contained within the state borders. 

“Wisconsin’s US Topo maps display the relief of the state’s glacial features that the Trail then interprets on the ground,” says Tim Malzhan, director of trail operations for the Ice Age Trail Alliance, the nonprofit arm in a partnership that manages and supports the Trail. “When people use these maps, seeing the ribbon of the Ice Age Trail as it crosses the state will allow them to learn about and explore Wisconsin’s glacial history.”

The Ice Age Trail will one day be a continuous 1,200-mile footpath spanning the state from the Minnesota border on the west to Lake Michigan on the east. The Ice Age Trail was designated a National Scenic Trail on Oct. 3, 1980, when Congress amended the National Trails System Act to authorize and establish the Ice Age National Scenic Trail as part of the National Trails System.

The USGS partnered with the National Park Service, Wisconsin Department of Natural Resources and Ice Age Trail Alliance to incorporate the Ice Age Trail onto Wisconsin’s maps. These three agencies worked cooperatively to shape the IAT into one of the premier hiking trails in the country. The USGS has future plans to include all National Scenic Trails in The National Map products, including updates to the US Topo map series.

These new maps replace the first edition US Topo maps for Wisconsin and are available for free download from The National Map and the USGS Map Locator & Downloader website.

As with all US Topo map updates, the replaced maps will be added to the USGS Historical Topographic Map Collection and are also available for download.

To download US Topo maps: http://nationalmap.gov/ustopo/

caption below caption below
Map of the state of Wisconsin that shows the path of the Ice Age National Scenic Trail across the state. The IAT starts on the western border of Wisconsin in the northern part of the state. It meanders east to north-central Wisconsin and then turns south, almost to the state’s southern border. It then turns northeast and winds up to the Door County Peninsula, where it ends overlooking the shores of Green Bay. (Larger image)

The National Trails System was established by Act of Congress in 1968 (amended 2009). The Act grants the Secretary of Interior and the Secretary of Agriculture authority over the National Trails System. The Act defines four types of trails. Two of these types, the National Historic Trails and National Scenic Trails, can only be designated by Act of Congress.

There are 11 National Scenic Trails:

  • Appalachian National Scenic Trail
  • Pacific Crest National Scenic Trail
  • Continental Divide National Scenic Trail
  • North Country National Scenic Trail
  • Ice Age National Scenic Trail
  • Potomac Heritage National Scenic Trail
  • Natchez Trace National Scenic Trail
  • Florida National Scenic Trail
  • Arizona National Scenic Trail
  • New England National Scenic Trail
  • Pacific Northwest National Scenic Trail

(Larger image)

USGS Newsroom


More information

Parameter Value Description
Magnitude mb The magnitude for the event.
Longitude ° East Decimal degrees longitude. Negative values for western longitudes.
Latitude ° North Decimal degrees latitude. Negative values for southern latitudes.
Depth km Depth of the event in kilometers.
Place Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 1970-01-01 00:00:00 Time when the event occurred. UTC/GMT
Updated 1970-01-01 00:00:00 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status Indicates whether the event has been reviewed by a human.
Tsunami This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG A number describing how significant the event is. Larger numbers indicate a more significant event.
Network The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type The method or algorithm used to calculate the preferred magnitude for the event.
Event Type Type of seismic event.
Event ID Id of event.
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