Which would you choose for trailriding...Honda CRF230F or CRF250X?

Depends on your height and what type of trail riding. I had an '05 230 and now ride/race a CRF250R but have spent some time on my friend's X model also. There really is no comparison between the bikes. The 250 is much taller so if you are under 5'7" it will feel very tall, especially in the woods. The 250 also has tons more power, not because of the extra 20cc but because it is a liquid-cooled race engine while the 230 is just a low output air-cooled trail bike engine. The 250 is about $3000 more like someone else mentioned but there is a reason for that, aluminum frame, liquid-cooled titanium valve race engine, race suspension with adjustable rebound and compression, etc. The 230 on the other hand is a very fun and dependable bike, it just won't be as fast, it is heavier and doesn't have great suspension. For casual trail riding it is a blast, but if you are doing fast and aggressive trail riding it is not the best choice. The X has kick and electric start while the 230 just has electric start, so there is always a chance of running the battery down trying to get the 230 started, especially if you have dropped it and it is flooded or whatever. It only takes a few good cranks to run the little battery down and if you are somewhere there is no hill to roll it off you are screwed.

Winter

i'd rather have the 250 but it's like 3 k more so i'd probably go with the 230

The 250X by far