It took me until my Junior year to realize that campus and Boulder in general really cater to the two wheeled mode of transportation. Make sure you invest in a lock. The most popular being the U-lock variety. Also, register your bike with CUPD as soon as you can in order to increase your chances of recovering your bike if it gets stolen.
I would also suggest maybe buying used. If you ride a $300 mountain bike it will likely be targeted by a your friendly neighborhood thief, a story I hear way too often. Try looking on the nifty Facebook marketplace for some great deals!
