SLIPPERY ROCK — Slippery Rock High School will host a softball clinic for girls ages 6-14 from 2 to 4:30 p.m. Sunday.

The clinic will also run Feb. 7 and 14. Cost is $40. Call Dan Hindman at 724-290-1954 for details.

EAST BUTLER — East Butler Baseball will hold its 2015 registration from 6 to 7 p.m. today at the East Butler Boro Building.Registration will also take place from 11 a.m. to 1 p.m. Saturday and from 10 a.m. to 2 p.m. Jan. 31 at the same location.

ERIE — The Lake Erie Duathlon returns to Presque Isle State Park Aug. 2 after a two-year hiatus.The Duathlon consists of a 5K run, 20K bike ride and another 5K run. All proceeds from the race benefit Girl Scouts Western Pennsylvania.For details or to register, visit lakeerieduathlon.org.

Butler High School boys volleyball coach Lew Liparulo will conduct a volleyball skills camp for boys and girls in fourth-through-sixth grade Sunday from 1 p.m. to 4 p.m. at the Butler Cubs Hall.Cost is $30.For more information, call Liparulo at 724-482-2796.