For a Foursquare church near you in NW Montana there are:-

Whitefish Foursquare Church
233 Kalispell Ave
Whitefish, MT 59937
              (406)862-1653       
Pastor Paul Ogle 

Eureka Christian Center
406 2nd Ave
Eureka, MT 59917
              (406) 297-2231       
Pastor Al Carrigan

Kalispell Foursquare Church
2794 Hwy  93 North
Kalispell, MT 59901
              (406) 755-4719       
Pastor Richard Whittet

Family Worship Center
2043 Hwy 37 North
Libby, MT 59923
Mailing Address: Family Worship Center
PO Box 855, Libby MT 59923
              (406) 293-3737       
Pastor Bill Sonntag

Polson Foursquare Church
64435 Hwy  93 North
Polson, MT 59860
              (406) 883-9347       
Pastor Gregg Perkins

Mission Mountain Worship Center
[Flathead Indian Reservation]
37301 Hwy 93 North
St Ignatius, MT 59865
Mailing Address: P.O. Box 826, St. Ignatius, MT 59855
              (406) 745-2301       
Pastor Lockley Bremner

Coming soon Church 29.
A new Foursquare Church to be launched in 2008.