Mountain House, California, is a name referring to three unincorporated communities in California:
Mountain House, San Joaquin County, California
The community of Mountain House, Alameda County, California
Brush Creek, California, a Butte County community formerly known as Mountain House
Mountain House, Kern County, California, a stage station of the Butterfeild Overland Mail
There isn't any community engagement that I've been able to find.