Registration is open for 207Lacrosse’s middle school elite league, which will be held Sundays from Sept. 8 to Oct. 20 at the Riverside Athletic Center in Portland. The 7-on-7 full-field games will have rotating times of 1, 2 and 3 p.m.

Registration is also open for 207Lacrosse’s other fall programs for players from kindergarten through grade 12. For more information or to register, visit www.207lacrosse.com.

The Megunticook Rowing Regatta will be Sept. 8 on Megunticook Lake in Camden.

The event features races of three and 10 miles, both of which start from Barrett’s Cove at 8:30 a.m. For more information, visit www.megunticookrowing.org.

The Portland Middle School hockey program will hold registration for the 2013-14 season from 4 to 6 p.m. Sept. 15 at Portland Ice Arena. The program is open to all Portland residents in grades 5 to 8. For more information, contact Chris Harmon at 749-6511.