Romney has said that his vice presidential selection would come sometime before the Republican national convention at the end of the month and after his foreign trip, which concluded Tuesday.
Earlier in the day, Romney will hold an event at the Jeffco Fairgrounds in Golden, Colo.
The Romney campaign has not said whether the former governor plans to meet with the victims or police involved in the movie theater shooting last month in nearby Aurora, Colo., although a spokesman for the Aurora police said earlier this week that she had not heard of plans for the presidential hopeful to meet with either. Thursday will be Romney's first visit to then state since the shootings.
President Obama visited privately with victims' families last month. The president's reelection team announced Thursday that Obama plans a two-day tour of the swing state next week, including stops in Denver and Grand Junction on Wednesday and events in Pueblo and Colorado Springs next Thursday.