Barack Obama will make a campaign stop at the Colorado State Fairgrounds in Pueblo on Monday afternoon.
He also plans a campaign appearance in Grand Junction that day, but details haven't been released.
It will be Obama's first return visit to the state since accepting the Democratic presidential nomination in Denver on Aug. 28.
Republican vice presidential candidate Sarah Palin will also be in Colorado on Monday, appearing at the Jefferson County Fairgrounds in Golden.
Both campaigns consider Colorado a battleground state.
The Obama campaign says his event is open to the public and no tickets are required, but an RSVP is encouraged.