IMO your best chance for raising trout in marginal climate areas is to have a well or spring water feeding a small pond. The smaller in inflow of cool water the smaller the pond needs to be. When I was in PA and MI, I have seen real small cement ponds that were fed with a small stream of continuous spring water to grow some trout; a miniature raceway system. It does not take much space to grow trout. Area as small as 8ftX8ft or even 6ftX6ft will work providing you have a constant small inflow of cool water. The member here that had the smallest trout pond was a student named 'small pond'.
See some of these links to trout in small ponds.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=275081

http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=320032

http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Main=26404&Number=337938#Post337938

http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=336903

http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Main=26341&Number=336885#Post336885

Last edited by Bill Cody; 07/04/14 08:59 AM.
aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management