While cakes are perhaps more traditional, visitors celebrating Colorado’s 150th birthday on Pikes Peak this summer will mark the milestone with donuts instead —  perhaps a record-breaking number of doughnuts dunked in coffee simultaneously.  “We are going to attempt a Guinness World Record on Aug. 1,” said Sarah Braun, the city of Colorado Springs’ interim manager of Pikes Peak – America’s Mountain. Pikes Peak hopes to attract 250 attendees who will all simultaneously dunk their doughnuts in coffee to break the record, she said. “We thought it would be a fun way to celebrate the day,” she said.…