This definition appears very rarely
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Samples in periodicals archive:
Avid cyclists are familiar with the Great Divide Mountain Bike Route (GDMBR), but herein lies a different kind of long distance cycling route of more extreme nature.
The challenge for all riders is to complete, as quickly as possible, the entire 2,800 miles of the Great Divide Mountain Bike Route (GDMBR), designed by the Adventure Cycling Association (ACA) to stay within 50 miles of the Continental Divide.
In June, Tomassetti, a Florida Bar member from Fernandina Beach, began his journey down the Great Divide Mountain Bike Route, a stretch of unmarked backcountry terrain along the Continental Divide from Alberta, Canada, to Antelope Wells, New Mexico.