http://www.jimmys-adventures.net/hiking-rifle/

Can Americans bring guns to Canada?
For my senior trip me and two friends are planning on backpacking across Canada. We plan on starting at the West coast and hiking to the East coast. We were wondering if we could bring our guns to hunt with. The guns we were planning on bringing are a Remington Model 700 Hunting Rifle, an AR-15 Sporting Rifle, and a 12 guage shotgun. Once again these are purely for hunting and we have trigger locks for all three.
Under the Canadian Firearms Act, the three classes of firearms are:
Non-restricted (most ordinary rifles and shotguns);
Restricted (mainly handguns); and
Prohibited (full automatics, converted automatics, handguns with a barrel length of 105 mm (approx. 4″) or less, and .25 or .32 caliber handguns among others).
Bringing Guns Into Canada
Prohibited guns, or replicas of prohibited guns cannot be taken into Canada. No exceptions.
To bring a Restricted gun into Canada, you must be 18-years of age or older and acquire an Authorization to Transport (ATT) from a provincial or territorial Chief Firearms Officer (CFO) before you arrive at the point of entry into Canada. You cannot get an ATT for purposes of hunting or self-protection.
To bring Non-Restricted guns into Canada, you must be 18-years of age or older, declare your guns at your first point of entry, complete a Non-resident Firearms Declaration form in triplicate, have it confirmed by a customs officer and pay a $50 (Canadian funds) fee.
Once confirmed, the Non-resident Firearms Declaration will act as a temporary license and registration certificate while in Canada and is valid for 60 days. Visitors may renew their temporary license any time during a 12-month period without paying an additional fee. Unlicensed non-residents who plan to borrow a firearm in Canada must obtain a Temporary Borrowing License.
Visitors will be able to purchase ammunition with Canadian firearms license, a confirmed firearms declaration form or a Temporary Borrowing License.
Additional laws apply to non-residents who purchase or borrow guns in Canada, to persons importing guns into Canada, and to use and possession of guns by minors while in Canada.
Season 2 Episode 4: Oregon Mule Deer