I see there are a few guys asking about Sprague.
Sprague lake is a great fishery and there are a few tricks you may want to try.
Walleyes in Sprague feed on Crawdads allot,more so than anywhere else that I fish for them.Use Crawdad crankbaits and fish them shallow.Many times I catch eyes in 2 or 3 feet of water.Another good Crankbait for Sprague is the Firetiger Shad-Rap,#5 or #7.I do very well with the Crawdad cranks on the tops of the points and I like the Shad-Rap on the flats.
I also like to fish Sprague with jigs.
Sprague has some great Mayfly hatches during the year and this is a great time for jigs.Not the big 3 and 4 inchers.Small Crappie jigs.I like the Culprit tube or the Kalins twister tail.
I have been useing the tri colored twister tails by Kalins at Sprague with great success for many years now.Fish them just like the bigger jigs that are used at Roosevelt with the exception of the weight,1/16th to 1/8th oz.
The Culprit tubes work very well under a slip float with a Leech or a crawler.

The one time I fished at Sprague Lake my son caught a bass with a large tumor on its side. It kind made me feel a little uneasy about the fish in there. Any one else find anything like this there, or is it just like us, in that every once in awhile it just happens to some unfortunate person for know particular reason?

Sometimes it just happens.Fish get sick or hurt.
Fungis,Tumors,Tape worms,preditor attacks.all sorts of things can come up.If the fish looks as though it will recover,then I release them, if not,I kill and discard them.I have been eating Sprague lake fish for many years now,just had some the other night.

I will be at Sprague July 1 to July 8th, if anyone else is going. I'll be at the 4 Seasons Resort.

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Sprague was too hot to fish 7/1-7/4. It put the day bite off. I didn't try fishing at night so can't speak on how that would work.

Day temps ran from 90-95 degrees. A thunderstorm came thru on 7/4 to cool things down. I was burned out by the heat by then and left the next morning.

It can get pretty warm on Sprague at times,LOL.
Sorry to hear you had a rough time Bill.We hit Coffee pot and had a heck of a good time with some nice Rainbows.We are going to head over to Soda for some cool night fishing tonight,hope to find some big Crappie and or Walleyes.