Spur 203 (Erma Avenue) is a state highway spur in Presidio County, Texas, United States, that runs north from U.S. Route 67 Business / Farm to Market Road 170 (US 67 Bus. / FM 170) in Presidio.
Spur 203 begins at Erma Avenue, signed as US 67 Bus. / FM 170, in Presidio. The highway travels north for before ending at a cul-de-sac.
Spur 203 was originally assigned on January 27, 1948 to a business loop of U.S. Route 75 (US 75) in McKinney in Collin County from US 75 (now Texas State Highway 5) via Tennessee street to US 75. On May 25, 1954, the route began to be also signed as business US 75. This routing was decommissioned and removed from the state highway system on October 28, 1961.
Spur 203 was reassigned on October 21, 1977 to a business loop of U.S. Route 277 (US 277) in Weinert in Haskell County. This was signed as a business route of US 277, but was transferred to U.S. Route 277 Business on June 21, 1990.
Spur 203 was designated along its current route on June 18, 1996 as a replacement for the former routing of US route 67 north of Presidio. Spur 203 was designated, along with former Texas State Highway Spur 310 (Spur 201), when the old bridge between these routes over Cibolo Creek was removed in 1996. On January 27, 2003, Spur 310 was cancelled.