Local corporations often have charitable giving at the site level – this is definitely true of Walmart and FedEx. Look at the primary employers in your community.
Local social clubs like VFW, Elks, Eagles, etc often have a process for donations.
Local Community Foundations like Western Colorado Community Foundation, Pikes Peak Community Foundation, Community First Foundation, Southern Colorado Community Foundation, etc.
El Pomar is one of the largest funders in Colorado.