That's the one area that I've been struggling with (and not married tosince my book takes place almost entirely in that swampy triangular place to the far west), mostly because I've been struggling with biomes. I made a heat map and attempted to do ocean currents and windage stuff, but it gets me messed up. What would more likely go there? I figured it would be the drier side of the mountains but it's also in the hot regions. I don't need a desert, honestly I'd rather it not be one, but that was all that I could make sense of.