The Trails BC Boundary Region extends from the height-of-land near McCulloch Lake on the west to the Dewdney Trail Santa Rosa Summit and the Columbia & Western Railway Farron Summit on the east.
McCulloch to Kettle River Provincial Park
This section of the Trans Canada Trail is primarily the rail grade that the Canadian Pacific Railway (CPR) abandoned in the late 1970's. The Province of British Columbia purchased the former Kettle Valley Railway / Canadian Pacific Railway right-of-way from the CPR in 1995. The historic KVR grade offers relatively easy cycling with minimal grades (usually less than one percent) and few detours.
Kettle River Provincial Park to Midway
In places the trail follows the former KVR grade and in others it uses adjacent roads. The trail on the abandoned rail grade became a paved public road on the north side of the Kettle River near Kettle River Station when the CPR left the area.
As the trail nears Midway from the west, trail users are rerouted from the original rail grade which runs right through the middle of Pope and Talbot's mill yard. P&T has provided an alternate route through their yard that is much safer for the trail user. As the trail enters Midway the trail users arrive at the old Midway Railway Station, which has been turned into a museum complex. A welcome pavilion has been constructed and trail users are welcome to use the museum's facilities. A spur trail into downtown Midway has been added.
Continuing east from Midway, the railbed trail parallels Highway 3 for much of the way to Greenwood. It passes Boundary Creek Provincial Park and crosses Copper Mountain Road before reaching the site of the former Greenwood station.
East of Greenwood, the trail follows the former C&W railgrade as it climbs to the ghost townsite of Eholt. The trail leaves the Highway 3 route near Eholt and follows forest roads and the C&W grade eastward to the Granby River valley before continuing south to Grand Forks.
Grand Forks to Christina Lake
After winding through the village of Grand Forks, the Trans Canada Trail follows the C&W railgrade eastward to Christina Lake where the trail traveller has two options. The southern route, and the first one to be worked on, follows much of the historic Dewdney Trail to Rossland.The longer and more northerly route follows the former Columbia & Western Railway grade to Castlegar.
The dividing line between the Trails BC Boundary Region and West Kootenay Region is the height-of-land on both routes.