For all Approach tours, you need to make sure that your passport is valid for 6 months after your scheduled return date to Canada. Many countries also require that your passport have at least four blank pages for them to stamp or fill in your tourist visa information.
If your passport is not going to be valid or have four blank pages, you will need to get a new one from Passport Canada. We require a photo or scan of your valid passport by the final payment due date for your tour, so make sure to get started early if you need to obtain a new one.