No. Dogs are not allowed in either Big or Little Cottonwood Canyons. They are watershed areas.
No dogs in the canyon or campground. It's a watershed.
Only those who are residents of Alta with special, limited permits, so basically no, you can't legally take your dog up there.
You will get fined if you try to take one up. $300 at least I think.
Thanks! Your answer is awaiting moderation.