Reid Spur is a spur, 5 nautical miles (9 km) long, in the Queen Maud Mountains, descending north along the east side of Ramsey Glacier from an unnamed prominence 3 nautical miles (6 km) northwest of Mount Bellows. Named by Advisory Committee on Antarctic Names (US-ACAN) for CWO James S. Reid, member of the U.S. Army Aviation Detachment which participated in exploring this area with the Texas Tech Shackleton Glacier Expedition, 1964-65.