Welcome to the Thornton Senior Center A fun, vibrant, friendly place to be. If you are age 55 or older, you are invited to spend time at the center. We offer educational and recreational programs, fitness classes, special events, trips, outdoor programs, health screenings and a fabulous daily meal program! Visiting the Center is a wonderful way to meet new friends, learn a new hobby, get fit, or take a trip to somewhere new. We also offer a host of Adult classes age 18+ in the evenings and on weekends.