Not individually listed in the Region 4 synopsis, so the general provincial and Region 4 (Kootenay) rules apply. Confirm the current synopsis before you fish.

Upper Little Slocan Lake is not a separate basin so much as a wide, slow reach of the Little Slocan River channel itself, an expansion of the river below its headwaters. A 1960 provincial lake survey measured it at roughly 75 hectares of surface area, with a maximum depth of 19.5 m and a mean of 10 m: enough depth for a real shoal-and-drop-off structure rather than a shallow bowl. Provincial aquatic-species records list 34 observations across five species here, including freshwater mussels of the genus Anodonta, a group sensitive to poor water quality. That contributes to a water-health signal that comes back excellent, with a health index of 78, one of the stronger readings among Slocan Valley stillwaters in the dataset.

Rainbow trout are the only fish on record here, carried by the historical stocking program rather than a mixed native fishery. Fished as a rainbow stillwater, the standard small-lake toolkit is the starting point: chironomid under an indicator over the shoals in spring and early summer, then Woolly Bugger and other leech patterns, plus dragonfly and damselfly nymphs stripped along the drop-offs as the shallows warm through summer. No fly-specific local reports turned up for this lake, so treat that as a sensible starting box rather than a confirmed local pattern, and read the water on the day.

Upper Little Slocan Lake sits in the Little Slocan River valley, upstream of Lower Little Slocan Lake, west of Slocan and northwest of Nelson. No launch, parking or trailhead details are confirmed here: treat the road in, any private-land sections and seasonal restrictions as something to check locally before committing a day to it.

For an angler weighing whether this is worth the drive, the release record is most of the story: 18 stockings totalling roughly 53,282 rainbow trout, all between 1986 and 2001, all rainbow trout and no other species. The full year-by-year history is below.