Gleaned from https://www.facebook.com/TownofEstesParkCO/posts/1803661319691878 and noted in EP News, Friday, May 25 2018 on p. 5:
The household hazardous waste drop-off returns and will take place Saturday, June 9, from 9 a.m. until 1 p.m. at the Town of Estes Park Water Division shop, 577 Elm Road, north of the turnoff to the Transfer Station, and just north of Juniper Lane. Unwanted household paints, stains, cleaners, yard and garden chemicals, used oil, adhesives, solvents, gasoline, batteries and other household chemicals may be brought to the collection site for proper disposal. This service is provided free of charge by the Town of Estes Park Water Division, Larimer County Solid Waste, Upper Thompson Sanitation District and Estes Park Sanitation for the benefit of the community and the environment.
The last hazardous waste cleanup took place in 2017 after a seven-year hiatus due to budgetary constraints. Almost 200 vehicles came to the collection last year, protecting the environment and watershed from dangerous contaminants by properly disposing of them.
Items that cannot be accepted include commercial waste, fluorescent lightbulbs, fire extinguishers materials containing asbestos, explosives, radioactive waste including smoke detectors, propane containers and containers larger than five gallons. For more information, please call the Town of Estes Par (sic) Water Division at 970-577-3619.