State Route 105 (SR 105) is a primary state highway in the U.S. state of Virginia. Known as Fort Eustis Boulevard, the state highway runs 4.90 miles (7.89 km) from Fort Eustis in Newport News east to U.S. Route 17 (US 17) near Grafton in York County. SR 105 is a cross-peninsula highway that connects Fort Eustis, a U.S. Army installation, with US 60 and Interstate 64 (I-64), and US 17 near Yorktown.