So far I found gps-track of Granby River Trail on AllTrails
This ~5km long trail goes along west bank of the river and stops at the parkís boundary
There is report of hiking this trail at ClubThread in 2018.
describing the trail saying after ~4km trail is messed up by burnt forest.
A map on Regional District of Kootenay Boundary website
shows trail going up way longer into the park. Trail on this map shown on eastern side of the river.
There is no mentioning of this trail anywhere else.
Additionally I found website dedicated to guide book "GRANBY PROVINCIAL PARK" "INSIDE-OUT" by Gary McLaughlin.
However no indication said book ever happened.
Did anybody out there hiked Granby River Provincial park from South, along Granby River?
Appreciate any reports/pointers.