Cross season is typically during the winter so the roadies and mtb racers can race during the summer.
Cross is my favorite type of racing, and I'm sure there's others out there who feel the same. I wish there were cross races all year round. I would gladly give up my weekends to cross racing instead of road/mtb. It would also be nice to switch it up (for those of us who don't care about cup points of standings) and race mtb one weekend, road the next, then cross and have all types of races available to you any given race weekend.