Visit

Eligible foreign nationals including United States (US) citizens can travel to Canada as visitors

There are a few visitor visa options

Anyone who plans to visit Canada must apply from outside of Canada before they travel

Business visitors must obtain visa to do business with Canadians and business in Canada. 

Electronic document for visa exempt foreign nationals to travel into Canada

Multiple entry visa for a period up to 10 years to  visit children or grandchildren for up to 2 years at a time.