U-CLIMB is a near-peer mentoring program in CS@Mines that trains selected students who have recently mastered CSCI 101 to mentor students currently enrolled in CSCI 101 and CSCI 102. Thanks to start-up support from the National Center for Women and Technology (NCWIT), U-CLIMB mentors foster a welcoming environment for all students to explore CS@Mines and demonstrate to students that anyone is capable of mastering the material. Ultimately, U-CLIMB seeks to broaden diversity in computing, extending to all underrepresented groups, so that CS@Mines will be comprised of a rich mix of participants reflecting the population it serves.