Sidewinder Proving Grounds is a environment in Forza Motorsport 3 set in Northern Italy, Tuscany. It features 18 track layouts. * Sidewinder Proving Grounds Layout I (4.81 mi (7.74 km)) * Sidewinder Proving Grounds Layout H (2.24 mi (3.6 km)) * Sidewinder Proving Grounds Layout G (2.05 mi (3.3 km)) * Sidewinder Proving Grounds Layout F (1.43 mi (2.3 km)) * Sidewinder Proving Grounds Layout E (1.38 mi (2.22 km)) * Sidewinder Proving Grounds Layout D (1.26 mi (2.03 km)) * Sidewinder Proving Grounds Layout C (0.84 mi (1.35 km)) * Sidewinder Proving Grounds Layout B (0.82 mi (1.32 km)) * Sidewinder Proving Grounds Layout A (0.63 mi (1.01 km)) * Sidewinder Proving Grounds Layout I Reverse (4.81 mi (7.74 km)) * Sidewinder Proving Grounds Layout H Reverse