These forests mark the northern extent of the range for California Buckeye.

The northern extent of its range in the Atlantic is 37 degrees South.

The area includes the northern extent of the Marcellus Formation and natural gas.

If it doesn't feel like your average college town, that'd be because this is also the northern extent of Silicon Valley.

The climate varies considerably between the northern and southern extents of this long mountain range.

The northern extent of the manor was marked by a boundary stone.

The location was the northern extent of developed settlement in Manhattan during the early 19th Century.

The exact northern extent can vary, and, as with most cultural regions, the boundaries of the South are sometimes disputed.

Both temperate and tropical species are present, in many cases near the northern or southern extent of their range.

The mountains' northern extent is hilly, dissected by a number of rivers.