Tongue River Marina posted the following information on Saturday, February 28th

Right off the boat ramp, there is about 15-20’ of open water, Marina bay is still mostly iced over, but it’s making progress. From Rattlesnake south towards the mine, there was a very large amount of open water. The forecast still shows freezing at night, but 50’s and 60’s during the day, if I had to guess, I’d say a couple more weeks and hopefully it’ll be time to try boat fishing.