St. Thomas or St. John Mountain Biking?

Can't really comment on the USVI as I haven't spent very much time there, but I have been to the BVIs many times and have never seen anything mountain bike related. You never know, there could be some trails and hard core bikers somewhere around, but I've yet to see it. YaMon is right about the terrain there - it is very steep. And riding on the roads would be a bit risky. If you want to get down to that area and must mountain bike I would say Puerto Rico would be your best bet. It is much larger and actually has some areas that are less than a 45 degree incline. I would bet that there are some really good trails in PR.

Also, I agree with FR about the BVIs versus the USVI. Although to get to the BVIs is extra coinage and you need a passport. I go to the BVIs to sail though and never spent too much time in one spot - I have a feeling I would get bored if I couldn't keep moving around. I could go on and on about that area of the Caribbean but I digress, you are asking about mountain biking, not vacationing.

I would say to not worry about mountain biking on any of the Virgin Islands and focus on other activities like boating, snorkeling, scuba, relaxing, windsurfing, surfing if there is swell, swimming, paddle boarding, eating good food, sipping on great drinks and hanging out with the wife.

http://forums.mtbr.com/showthread.php?t=477556

http://rjs.org/vi.html

http://trails.mtbr.com/cat/united-states-trails/us-territories/trails-puerto-rico/PLS_4574crx.aspx

Matt