A viral tweet about a rock in southwest Colorado is celebrating its fifth anniversary on Monday. "Large boulder the size of a small boulder is completely blocking east-bound lane Highway 145 mm78 at Silverpick Rd," the San Miguel Sheriff’s Office tweeted on Jan. 27, 2020. "Please use caution and watch for emergency vehicles in the area." That tweet has been viewed more than 77 million times. Read more: https://www.9news.com/article/life/style/colorado-guide/large-boulder-size-of-small-boulder/73-a4d60df3-ea35-4104-bb80-1188bdbc734a ------ More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.