A spur is a lateral ridge or tongue of land descending from a hill, mountain or main crest of a ridge. It can also be defined as another hill or mountain range which projects in a lateral direction from a main hill or mountain range.
Examples of spurs include:
Abbott Spur, which separates the lower ends of Rutgers Glacier and Allison Glacier on the west side of the Royal Society Range in Victoria Land, Antarctica
Boott Spur, a subpeak of Mount Washington
Kaweah Peaks Ridge, a spur of the Great Western Divide, a sub-range of California's Sierra Nevada
Kelley Spur, four kilometres (two nautical miles) east of Spear Spur on the south side of Dufek Massif in the Pensacola Mountains, Antarctica
Geneva Spur on Mount Everest
Sperrin Mountains in Northern Ireland