Compare to Viburnum prunifolium or Viburnum rufidulum.

Thanks everyone! I think it might be the leatherwood. I have a second photo of the berries, where it shows the twig it is growing on better. The leaves are alternate. I think my plant looks a lot like this picture I found of a leatherwood, . What do you think?

Black huckleberry, Gaylussacia baccata. Fruits are tasty but "seedy".

This common double garden form holds what should really be the name (S. prunifolia) of the parental species because the single-flowered wild type (S. prunifolia f. simpliciflora) was not discovered until after the double variant had been introduced from Japan in 1845. And back in the day garden forms of newly introduced plants were being named and described as botanical species. Staying just within the same Rose Family other examples of this backward naming phenomenon that linger to this day are the double white Banksian rose introduced from Canton in 1807 being known as Rosa banksiae, with the wild original being dubbed a var. normalis* of it. And R, chinensis being used to embrace horticultural selections introduced during the late 1700s and early 1800s, with the true species level version discovered about 1885 being called R. chinensis var. spontanea. *Said to have actually been introduced to Scotland in 1796 but it malingered in the climate there until cuttings of it produced flowering plants in Nice during 1909