Lightning Lakes Professional Review and Guide
"Although Lightning Lake and its neighbour, Flash Lake, are well known even to casual visitors to Manning Provincial Park, you may penetrate farther into their valley and leave the crowds behind on the way to Strike and Thunder Lakes, the other two bodies of water that make up the chain. Whatever your choice, you are assured of an easy walk with little elevation change through an area of contrasts, from the forest surrounding the first lakes to the arid, scree-covered slopes above Thunder Lake. You may give a thought to the past as well, for these improved park trails you tread today were originally created by trappers in the early days of the century.
There are trails along both sides of Lightning and Flash Lakes, permitting a choice of routes. However, as described here, the trip takes the south shore of both Lightning and Flash Lakes before crossing to follow the north shores of Strike and Thunder. Note that on the outward leg of the trip you are dropping elevation so that as you return it is all uphill, albeit very gradual. Take that into account in scheduling your time."