Looking into a trip to Whistler in Jasper NP but not till 2018. Went to the website for reservations which states...
2017 reservations are available now at most locations – plan your visit! To make it easier to plan your experiences, reservations for visits from April 2017 through to March 2018 are now available at most locations.
Search below for details, including the specific operating and reservable dates for each location.
For Whistler in particular it states:
2017 Operating Season 1 2017 Reservable Period 2
May 3 to October 8 May 3 to October 8
If I wanted to make reservations for say June 1 2018, would this become available June 1 2017? Can't find a reservation window on the site.