Crazy blue. It is interesting; IR in the winter, is anything emitting rays warm enough for photo ? This looks like pictures in travel agencies display windows after too long time in the sun. However I like composition of #2 and 3 and like quite delicate BW conversion by Rick.
For me, it works nicely on the first shot, a little on the second shot and not at all on the last shot...I did quite a lot of work with high speed infrared film back in the 60's. We used it in conjunction with a certain type of aircraft in shooting very distant shots of the a certain trail...interesting how much dead foliage looks the the real, living stuff.