New street circuits in Baltimore and Oklahoma City are set to join the American Le Mans Series calendar next year.

Series bosses are known to be in talks with the IndyCar Series over joining its event on the streets of Maryland's largest city. The ALMS and IndyCar have cooperated on a number of events in recent years, including this weekend's doubleheader at Mid-Ohio, while officials in Oklahoma revealed back in March that they, too, were speaking to the ALMS.

AUTOSPORT reports that both venues are close to concluding deals to host the ALMS in 2011, with series boss Scott Atherton also confirming that discussions had taken place. The magazine reports that the Baltimore event could replace Lime Rock on the calendar.

Oklahoma would likely take the Independence Day weekend date at the beginning of July.