Maryland Gov. Martin O'Malley . (Patrick Semansky/AP)

O’Malley (D), who is widely assumed to be interested in national political office in 2016, has been booked Friday as the keynote speaker at the Boulder County Democratic Party Truman Dinner in Longmont, Colo.

It is the latest in a string of appearances that has put O’Malley in front of Democratic audiences in states where new friendships could be helpful down the road.

On much of his travel, O’Malley has worn the cap of chairman of the Democratic Governors Association, which is helping coordinate 11 gubernatorial races around the country this year.

The rationale for some other destinations is not as immediately apparent. Colorado, for example, is among the battleground states in this year’s presidential race, but it does not have a governor’s race on the 2012 ballot.

While O’Malley’s travel — and frequent Sunday talk show appearances — has help boost his national profile, he continues to get some flak back home for his absences.

In coming weeks, O’Malley is also booked to speak to the Democratic National Convention in Charlotte and at a steak fry in Iowa, the nation’s first presidential caucus state. He made an appearance in June in New Hampshire, traditionally the first primary state, at a Democratic convention there.