UPCOMING EVENTS SEE ALL Rio Grande Mexican Restaurant Share: Restaurants Rio Grande Mexican Restaurant Visit Website Request Info 1101 Walnut St Boulder, CO 80302 (303) 444-3690 (303) 444-2878 (fax) http://www.riograndemexican.com Hours: Sun-Wed: 11am - 10pm Thrus, Fri and Sat: 11am - Midnight About About Mexican restaurant; voted Best Margarita; rooftop deck; serving lunch & dinner