Northwest Arkansas (NWA) is a metropolitan area and region in Arkansas within the Ozark Mountains. It includes four of the ten largest cities in the state: Fayetteville, Springdale, Rogers, and Bentonville, the surrounding towns of Benton and Washington counties, and adjacent rural Madison County, Arkansas. The United States Census Bureau-defined Fayetteville–Springdale–Rogers Metropolitan Statistical Area includes 3,213.01 square miles (8,321.7 km2) and 576,403 residents, ranking NWA as the 98th most-populous metropolitan statistical area in the U.S. and the 13th fastest growing in the United States.

The Northwest Arkansas Razorback Regional Greenway is a 40 miles (64 km) primarily off-road shared-use trail in Northwest Arkansas. Dedicated on May 2, 2015, the Greenway connects Kessler Mountain Regional Park in Fayetteville, Arkansas to north of Lake Bella Vista in Bella Vista, Arkansas, while also serving schools, businesses and other cultural amenities along the route. In 2023 the Greenway was designated as a National Recreation Trail and was added to the National Trail System.