Hydraulic Lake is a man-made reservoir located approximately 35 km southeast of Kelowna in British Columbia's Okanagan region, sitting at an elevation of 1,219 m (3,998 ft). The lake covers 260 hectares (642 acres), making it a substantial body of water for paddling. It is also known as McCulloch Reservoir or McCulloch Lake, and lies near the Kettle Valley Railway portion of the Trans Canada Trail.

Access is straightforward: from Kelowna, travel southeast on Highway 33 to Hydraulic (McCulloch Reservoir) Lake Road, then turn west and follow the road a few kilometres to the lake. A BC Forest Service campsite with a boat launch is located at the north end of the lake, which serves as the primary put-in point. Paddlers are advised not to block the access road when parking near the campground, as it is regularly used by campers.

The campsite offers 18 sites with tables and primitive toilets, and fees apply from May 15 through September 15. Additional sites are available further down the road. Given the lake's ice-over period running from late October through May, the practical paddling season runs roughly from late spring through early fall.

The lake is recognized as a paddling destination within the Okanagan Valley Central region and has been listed alongside other kayaking destinations in the area. Its proximity to the Trans Canada Trail corridor adds a recreational context for those combining paddling with other activities. Nearby Ern Lake lies approximately 1 km to the west, accessible via a branch road just beyond the north end of Hydraulic Lake, and Browne Lake is within a few kilometres as well.

The lake supports a rainbow trout fishery, with fish occasionally reaching up to 5 lbs, which means anglers using trolling gear and fly fishing equipment are commonly encountered on the water. Paddlers should be aware of fishing activity, particularly during the warmer months when angler usage is described as moderate.