Revrnd is right, it's a Stoney Lake trail. Normally, it crosses a road bridge over the Crowe River but that bridge is being replaced so the trail and the road is out of action there.
That being said, the club has created a re-route which goes from Glen Alda (at the Bordertown Café), alongside of Highway 620 west for about 1km and then south about 2km on Glen Alda Road and re-joins the trail at Winters Bay Road. There are a couple of "Follow Road to Trail" signs on the re-route.
The lake trail through Winters Bay is not staked this year but the other Stoney Lake trail on Chandos is staked and it gets a lot of traffic.
As long as there's snow on the side of Highway 620, the re-route is not too bad.