Just behind Mardon resort is Corrall Lake. Not fished very much and it has huge rainbows in it. It's a great place when the wind picks up on the res. Stop in at the check in booth and look at the pictures on the wall. Numerous 10-12lb fish are up there to tempt ya. We hit it in august coming home from montana. We fished just before sunset for about an hour and a half slow drifting corkies tipped with worms and slow drifting wedrings right off bottom. We got 4 nice fish between 16-20" and on the last pass my g/f landed a nice 5-6lb fish. Pretty good for just that little bit of effort and time.