I have fished the pond at Pinnacle both summer and winter, with little luck on the ice. If I recall, there was about a foot of snow making the water very dark, and I got skunked. I'd like to go back and tackle this pond again because I know there's several species in there. Someone once told me that deep ponds have a no oxygen layer near the bottom and you won't find fish at that level, but I have no way of confirming that. Please post how you make out. Good luck.
KW