I don’t know the history other than it’s in the shape of a heart but there are several different paths to take to this lake. I’d recommend using AllTrails (mentioned below) but this is definitely a beautiful lake to visit on a sunny day!
Location
This is located near Ladysmith, British Columbia but there’s many ways to get to Heart Lake. I was running tight on time so I parked in the lot located below then walked up hill, past the closed gate and followed the road. I’d recommend AllTrails if taking this route: https://www.alltrails.com/trail/canada/british-columbia/heart-lake