I'm going to say all summers and here's why:

You're wearing light clothing while holding all of the bright hens, so one could assume it was warm out that day. (spring/summer/fall) Bright fish = warm day = summer run.

It looks like Micropterus101 is holding the colored wild (unclipped) bucks because the person pictured is wearing his infamous camoflauge jacket. You guys fished together just recently and any winters in the NF Lewis now wouldn't already be dark.

So there's the rationale for my guess. Hopefully I'm at least half right...