 clyde park is a town in park county, montana, united states. the population was 288 at the 2010 census. originally known as sunnyside, the town was renamed in the 1890s.capace, n. (2000) encyclopedia of montana. north american book dist llc. p 212. == history == founded in the 1870s, the present-day site of clyde park was originally founded as sunnyside by texas cattlemen who were attracted to the area for grazing their herds. the post office in sunnyside was established in 1887.aarstad, r., arguimabau, e., baumler, e., et al. (2009) montana place names: from alzada to zortman.montana historical society. p 50. in 1887, a post office called clyde park was established at the historic harvey and tregloan ranch, where john harvey owned a clydesdale horse which he had imported from england in the late 1890s.jiusto, c., br
Towns_in_Montana