Hempfield won its first WPIAL title a year ago in girls track and field, while the boys won their second consecutive WPIAL crown.
If the Tri-State Track Coaches Association's outdoor championships are any indication, both Spartans teams will be top contenders at the WPIAL championships again this season.
Hempfield defeated Mt. Lebanon for both team titles Saturday in the 32-school invitational on a cold and windy day at West Mifflin High School.
"We're going for a WPIAL title again," Hempfield junior Bridget Guy said.
Guy led the way for the Spartans, winning the pole vault and long jump.
She set a personal best in the pole vault, clearing the 12-foot, 1-inch mark, to beat out teammate Lexi Masterson, who finished second with her best vault of 11-6.
"Lexi and I come into every meet planning on a sweep and that's nice to have a teammate you can share that with," Guy said.
Guy also went 1-2 with teammate Maddie Holmberg in the long jump. It was one of three individual medals for Holmberg, who won the 100-meter hurdles and placed second in the 200-meter dash.
Hempfield's Lauren George (triple jump), Natalie Shiffler (javelin) and Rachel Fyalkowski (shot put) also won gold medals.
Oakland Catholic junior Taylor McCorkle joined Guy as the only girl to win multiple individual events, taking the 100- and 200-meter races.
"I thought I did pretty good," McCorkle said. "It was really windy so I think my times were good for the weather conditions."
In the boys competition, Hempfield picked up wins from Chandler Crusan (400 meters), Max Adams (discus) and its 3,200-meter relay team.
Sherman West also came through for the Spartans with second-place finishes in the 200- and 400-meter events.
West was part of a loaded 200-meter field that included four 2012 WPIAL Class AAA top-eight finishers in either the 100, 200 or 400 meters -- West Mifflin's Jimmy Wheeler, Upper St. Clair's John Rutkowski, Gateway's Cameron Gray and Crusan.
It was Wheeler who got the win, pulling away from West and Gray down the stretch and finishing with a time of 22.85 seconds.
This came after Wheeler placed a disappointing fourth -- behind Erie Cathedral Prep's Jake DeHart, Gray and the event's winner, Troy Apke of Mt. Lebanon -- in the 100-meter dash earlier in the day.
"I didn't have that good a day in the 100, so I knew I needed to go hard in the 200," Wheeler said.
Wheeler finished third in the 200 meters and fourth in the 100 meters at the WPIAL championships a year ago.
The only boys competitor to win gold medals in multiple individual events was Allderdice's Ean DiSilvio, who defeated Vincentian's Alex Archer in the 1,600- and 3,200-meter races.