The route was originally 1.8 miles (2.9 km) long; from 1951 onward it was extended to 2.1 miles (3.4 km). Organizers initially explored using the famous 17 Mile Drive but ultimately settled on a collection of roads near the Lodge, chosen for their compact layout and suitability for the smaller cars of the era.
The 1950 route began along Portola Road near the present-day Pebble Beach Equestrian Center. Cars turned right onto Sombria Lane, then right again onto Drake Road, then right once more onto Forest Lake Road before a sharp right-hander at Ondulado brought them back onto Portola past the start/finish line. From 1951, the course was modified so that after Drake Road drivers turned left onto Alvarado Lane (later renamed Stevenson Drive) and then sharp right onto Forest Lake Road before the same final corner.
Not all of the circuit was surfaced: the original 1950 layout included both paved two-lane roads and stretches of dirt or loose gravel, giving the track a distinctly ad hoc character that matched the pioneering spirit of American road racing in the early 1950s.
The circuit's defining feature was its narrowness and the tall Cypress trees that hemmed in the track on either side, creating a fast, tunnel-like atmosphere with little margin for error. Despite these conditions, serious accidents were rare during the event's first six years. The tight, twisty nature of the course rewarded car control and local knowledge, and the SCCA-managed format kept proceedings broadly orderly.
The Pebble Beach Road Races occupied an important place in the early calendar of American sports car racing. Held at a time when road racing on public or semi-public roads was the predominant format in the United States, the event attracted a competitive mix of domestic and imported machinery and helped establish sports car racing as a credible spectator sport on the West Coast.
The races ran without major incident through 1955. In 1956, however, driver Ernie McAfee — unrelated to fellow racer Jack McAfee — fatally crashed his Ferrari into a tree. The death brought the popular event to an immediate end. The closure of the Pebble Beach Road Races did not leave California without a major road circuit for long: the tragedy was a direct catalyst for the construction of Laguna Seca Raceway, which opened in 1957 and went on to become one of the most celebrated permanent circuits in North America.
The Pebble Beach Road Races represent an important chapter in the history of American motor sport, embodying a moment when racing on public roads was still viable and when sports car culture was taking root in the United States. The circuit's picturesque Monterey Peninsula setting lent it a glamour that few contemporary American venues could match.
The course gained a further layer of cultural longevity when it was recreated in the simulation game Grand Prix Legends, introducing the layout to a new generation of sim racers and preserving its unusual character in a playable form.