Lasso Country Music Festival takes place in Montreal, Canada on August 15-16, 2026, featuring headliners Thomas Rhett and Mumford & Sons. This two-day country music festival showcases 21 artists performing country, pop, alternative, contemporary country, and rock music. The lineup includes artists from the United States, Canada, and United Kingdom, offering a diverse mix of North American and international talent. Music fans can expect a blend of traditional and contemporary country sounds alongside pop and rock influences at this Montreal festival.