NASCAR’s hyped return to dirt is instead a muddy mess on hold at least until Monday.

Torrential rains flooded campgrounds and parking lots surrounding Bristol Motor Speedway and created a rut for NASCAR far deeper than anything the Cup Series drivers encountered on the track.

NASCAR canceled all Sunday activity because even if Bristol’s converted dirt track could eventually be readied for night racing, the entire facility was a swampy mess. Grandstand seats that had been covered in dust were caked in mud, while pit road and the apron around the 0.533-mile bullring held several inches of standing water.

After 2½ inches of rain fell across “Thunder Valley,” NASCAR made an atypical decision to call an early washout. The first Cup Series race on dirt since 1970 was rescheduled for 4 p.m. Monday; trucks were set to run at noon.