East Coast Adventures (ECA) is an outdoor endurance-event organization focused on bringing runners and communities together through trail races, ultramarathons, road races, and timed challenges. Its calendar features events across Tennessee, including Knoxville, Madisonville, Athens, and the Cherokee National Forest, with courses ranging from flat, certified loops to rugged mountain trails. Participants can choose from distances and formats such as 5Ks, fun runs and walks, 50Ks, 100-mile challenges, timed races, and ruck divisions.

Signature events include the Worlds Fair Ultras, the Cherokee Ultra, Fort Frenzy Ultra Festival, Dirt Circuit, and the patriotic 17. 76 Merica Run. ECA also collaborates with other event organizers on races such as the Taco Bell 50K and Bigfoot 5K.

Beyond producing events, the organization provides race timing services and supports community-focused races that benefit local causes, including food assistance for Monroe County students. Its website also offers a shop, podcast, and ECA Running Team, alongside information about its mission and organization