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State Road 525 (NM 525) is a 4.946-mile-long (7.960 km) state highway in the US state of New Mexico. NM 525's southern terminus is at the entrance to Stallion Site Camp, and along the northern perimeter of the White Sands Missile Range and the northern terminus is at U.S. Route 380 (US 380) east of San Antonio. This is the only public access route, and gate, to the US Army's semi annual public open house of the Trinity Site.