A bit of a drive I think for you but about 17 miles south of Baker City you will be at Phillips Reservoir. Nice campground, great fishing and you can check out Sumpter which is down the road a bit. Or any of the other lakes in the area, super trout fishing in many of them!!
Found info here:
https://www.go-oregon.com/Phillips-Reservoir/#It looks like a great place to try!
