Call 811 Before You Dig 250

The Call 811 Before You Dig 250 is a NASCAR Xfinity Series stock car race held at Martinsville Speedway, in Martinsville, Virginia, originally held from 1982 to 1994 as a standalone spring meeting, but starting in 2021 returns as part of a three-day tripleheader along with the NASCAR Whelen Modified Tour and NASCAR Cup Series.

History
The first race was held on March 28, 1982 as the Dogwood 500 over a distance of 250 laps, which corresponded to a total distance of around 211 km. The first winner was Sam Ard, who also won the Miller Time 250 the following season. The race distance of 250 laps remained the same as in the 1984 season when Jack Ingram won the race. In the 1985 season, the race distance was reduced to 200 laps or around 169 km. Brett Bodine won the race renamed the Miller 200. Although the distance remained the same from the 1986 season, the race was renamed the Miller 500. In 1986 and 1987, Morgan Shepherd and Brad Teague made their mark on the roster before Jimmy Hensley won the Miller Classic in 1988. In subsequent seasons, the winners were Tommy Ellis, Tommy Houston and Jimmy Hensley. In the 1992 season the name was changed back to the Miller 500 and Kenny Wallace won the race. In the last two seasons in which it has been held, the race distance has been 300 laps or approximately 254 km. In 1993 Ward Burton won and in 1994 Terry Labonte became the final winner of the race.

It was first held as a Late Model Sportsman and Modified doubleheader in 1970, and in 1982 the Late Model Sportsman feature changed to a touring format for the original 1982 Budweiser Late Model Sportsman season, and stayed as a touring race until 1994. Following the 1994 season, both of Martinsville's race, the Miller 500 and the Advance Auto 500, were converted to Late Model only races. The March Late Model race was discontinued at the end of the 1997 season.

In 2021, the Xfinity Series restored Martinsville's spring date as a night race in support of the Cup Series' Blue-Emu Maximum Pain Relief 500 and aligned with the Modified Tour where the two series race over consecutive nights, instead of racing on one day. The race is one of two Xfinity events at the short track along with the Draft Top 250 in the fall.

The race changed distances several times in its history. When first held in 1970, the Late Model Sportsman and Modified features were both 250 laps, covering 131.2 mi. Following the addition of local Late Models and the conversion of the Modified race into part of the NASCAR's regional touring series in 1985, the two touring races were decreased to 200 laps, 105.2 mi with a 100 lap, 52.6 mi Late Model feature, where it remained until the Modifieds were removed for the 1993 season, when the distance was increased to 300 laps, 157.8 mi for the touring Busch Grand National cars, and 200 laps, 105.2 mi for the Late Model race. When the race format became strictly Late Model only, the qualifying races and Late Model feature (25 lap heat races and last chance race) totaled 300 laps. The race was discontinued after the 1997 season, and only the fall race was held for Late Models.

The race was never 500 laps, miles, or kilometers in distance at any point in its history. The "500" originated from Martinsville's two traditional combination Late Model and/or Modified races that resulted in a 500-lap format:


 * 1970–84: 250 laps, co-featured with Modifieds
 * 1985–91: 200 laps, co-featured with the NASCAR Whelen Modified Tour, and 100 laps Late Model racing
 * 1992–94: 300 laps, and 200 laps Late Model racing
 * The 2021 Cup Weekend format will return to the 1970-84 format of 250 laps. The Whelen Modified Tour returns as the Thursday night feature, with the Xfinity race the Friday night feature. No practice or qualifying will be utilised as part of post-pandemic restrictions.