Join Now Simply select a level below to become a member. Please allow 7-10 business days for us to process your membership and mail your materials. If you have questions, please contact our membership office at (303) 866-3639 or membership@state.co.us. *If you are looking to reserve Georgetown Loop Railroad tickets ASAP, please buy your membership through Georgetown Loop by calling 888-456-6777. They can help you purchase a membership AND book your tickets. Please be patient while the form loads. Main navigation - Levels 3 & 4 About us AmeriCorps Careers Membership Join Now Membership FAQ Renew History Buff Memberships Digital Members Lounge Tax Deduction Information Our Museums and Exhibits Philanthropy Membership Membership Levels Volunteer Donate Internships & Fellowships Affiliate Network Traveling Exhibitions