Join Now Become a member today to support our mission and enjoy the many benefits! 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. Looking for corporate memberships? Click here. Are you an educator, History Colorado volunteer, or veteran? Please call us for special membership pricing. Main navigation - Levels 3 & 4 About us Careers Membership Join Now Renew History Buff Memberships Digital Members Lounge Tax Deduction Information Our Museums and Exhibits Volunteer Donate Internships & Fellowships