Fisherboy, welcome to the website. If you are asking about rainbow trout in the Lower Mainland, there are numerous lakes where you can try to catch them. The fishing is generally very slow in the winter months, but expect the fishing to be good in Spring, starting around April, when the lakes are stocked with rainbow trout by the Fraser Valley Trout Hatchery. Keep checking back on the website around April for updated stocking information. Some of the lakes with good shore access that you may want to try out with your friends and families include:
Alice Lake in Squamish
Rice Lake in North Vancouver
Trout Lake in Vancouver
Sasamat Lake in Port Moody
Buntzen Lake in Port Moody
Como Lake in Coquitlam
Lafarge Lake in Coquitlam
Green Timbers Lake in Surrey
Mill Lake in Abbotsford
Please check out
this article for more information.