We are working on getting an online billing set up, and should have that system ready by the end of 2022, but in the meantime you can mail check to PO Box 722, Estes Park, CO 80517 or drop off a check at 1201 GRAVES AVENUE. Setting up an an automatic payment through ACH is a simple and free method of paying your bill. A copy of the ACH form is available on forms tab or you can fill in the information from the Home Page in the update ACH section.