Like it. As mentioned, nice colour.
I see what you mean, I think, about the pattern in the greenery. Not sure if I'd have noticed it if you hadn't mentioned though, since I read the comments before resizing my screen to get a proper look at it. Do you mean the area that looks like you're looking through some textured glass? It doesn't seem to be present in the corner right at the track in front of the engine, where the pink flowers are. I also see a wee ripple on the rail at the far left. You might try a blur but then, you don't want it to look like you did.
Only thing that comes to mind is, where's the exhaust on this engine? Engines create a lot of heat... Were you shooting through a cloud of hot air, or -- yes, I know it's Alaska, but could there have been some heat-shimmer ahead of you that showed up with the telephoto?
And -- welcome to Pentax forums