Question: Where do they hold NASCAR races in the city that is in the same county as the Eric Marcus Municipal Airport?

Knowledge 1: Eric Marcus Municipal Airport
Eric Marcus Municipal Airport is a county-owned, public-use airport in Pima County, Arizona, United States. It is located north of the central business district of Ajo and is about southwest of Phoenix. The airport was renamed on February 11, 2006; it was formerly known as Ajo Municipal Airport. [SEP] Knowledge 2: Pima County Natural Resources, Parks and Recreation
Pima County Natural Resources, Parks and Recreation is the agency within Pima County, Arizona that manages the natural resources, parks, and recreation offerings within Pima County including Tucson, AZ. [SEP] Knowledge 3: Tucson, Arizona
Tracks include Tucson Raceway Park and Rillito Downs. Tucson Raceway Park hosts NASCAR-sanctioned auto racing events and is one of only two asphalt short tracks in Arizona. Rillito Downs is an in-town destination on weekends in January and February each year. This historic track held the first organized quarter horse races in the world, and they are still racing there. The racetrack is threatened by development. The Moltacqua racetrack, was another historic horse racetrack located on what is now Sabino Canyon Road and Vactor Ranch Trail, but it no longer exists.
Knowledge 1: Pima County Natural Resources, Parks and Recreation
Pima County Natural Resources, Parks and Recreation is the agency within Pima County, Arizona that manages the natural resources, parks, and recreation offerings within Pima County including Tucson, AZ. [SEP] Knowledge 2: Tucson, Arizona
Tracks include Tucson Raceway Park and Rillito Downs. Tucson Raceway Park hosts NASCAR-sanctioned auto racing events and is one of only two asphalt short tracks in Arizona. Rillito Downs is an in-town destination on weekends in January and February each year. This historic track held the first organized quarter horse races in the world, and they are still racing there. The racetrack is threatened by development. The Moltacqua racetrack, was another historic horse racetrack located on what is now Sabino Canyon Road and Vactor Ranch Trail, but it no longer exists. [SEP] Knowledge 3: Eric Marcus Municipal Airport
Eric Marcus Municipal Airport is a county-owned, public-use airport in Pima County, Arizona, United States. It is located north of the central business district of Ajo and is about southwest of Phoenix. The airport was renamed on February 11, 2006; it was formerly known as Ajo Municipal Airport.
Knowledge 1: Eric Marcus Municipal Airport
Eric Marcus Municipal Airport is a county-owned, public-use airport in Pima County, Arizona, United States. It is located north of the central business district of Ajo and is about southwest of Phoenix. The airport was renamed on February 11, 2006; it was formerly known as Ajo Municipal Airport. [SEP] Knowledge 2: Tucson, Arizona
Tracks include Tucson Raceway Park and Rillito Downs. Tucson Raceway Park hosts NASCAR-sanctioned auto racing events and is one of only two asphalt short tracks in Arizona. Rillito Downs is an in-town destination on weekends in January and February each year. This historic track held the first organized quarter horse races in the world, and they are still racing there. The racetrack is threatened by development. The Moltacqua racetrack, was another historic horse racetrack located on what is now Sabino Canyon Road and Vactor Ranch Trail, but it no longer exists. [SEP] Knowledge 3: NASCAR Speedway Division
The NASCAR Speedway Division was a short-lived series brought forth in 1952 by NASCAR president and founder Bill France Sr. The series consisted of open-wheel race cars competing with stock engines. The idea of the series was to draw from the popularity of other open-wheel racing events such as the Indianapolis 500.

Answer: Tucson Raceway Park