Shellmouth is a small village in the Rural Municipality of Riding Mountain West. It was formerly a town in the R.M. of Shellmouth-Boulton and prior to that the namesake town of the R.M. of Shellmouth. Although a shadow of its former self this small village is still the centre of the surrounding farming committee. It also features a municipally designated historic site, the Shellmouth United Church, which was formerly Presbyterian, is a wooden structure that was built in 1905. 
https://www.historicplaces.ca/en/rep-reg/place-lieu.aspx?id=5371