There are several lakes in the Lower Mainland where the Fraser Valley Trout Hatchery has put large rainbow trout in them. Most of these fish have spawned multiple times at the hatchery and released because they don't intend to use them again. The stocking data in Region 2 provides you the information on where these fish were put in.
http://www.fishingwithrod.com/fishing_report/stocking_2.htmlThis photo is one of those trout. This was taken during last year's Fraser Valley Trout Hatchery Open House where the kids could fish at the Learn2Fish ponds.
http://www.fishingwithrod.com/member/gallery/2006abbotsford/061125_15Oddjob, Whonnock Lake is best accessed by boat, but there are several points along the lake where shore fishing is possible.
None of the lakes have been stocked yet, but they will be starting around late March. I will be posting the stocking data once again in the above link for all regions once the information comes in from the hatcheries. If you have any questions regarding stockings or the trout fishing in general, you can come to the Fraser Valley Boat & Sportsmen's Show on March 2nd to 4th and ask the hatchery staff personally.