Records are nothing new to Shoreham-Wading River’s Kath erine Lee, but her performance Sunday helped bring all of her accomplishments together.

The junior broke the Suffolk indoor 3,000-meter record in 9 minutes, 37.77 seconds at the Art Mitchell Invitational at Suffolk County CC-Brentwood. It gave her a trifecta of Suffolk distance records with her outdoor 3,000 and Sunken Meadow State Park 5k.

“I feel like today, it wasn’t even something I was going for, but it kind of just completed something for me,” Lee said. “It really came full circle, I think, that I really left my mark on all the distance events that I could.”

She broke the record of 9:48 set by Mary Kate Anselmini of Ward Melville in 2011, according to Suffolkxctf.com. Lee came in looking to hit 40-second-and-under splits to bring her time below 10 minutes, and she had to work against the clock without a challenge for first place.

“It was a really satisfying race when I saw that I was able to start consistently doing 39s, 38s and running those times,” Lee said.

Lee’s spring record is 9:39.88, and she considered it a major milestone to be able to top the outdoor time inside. She said it is setting her up for a productive spring, when she can bring that mark down even further.

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“I think my junior year has real ly been a standout year for me,” said Lee, who set Suffolk’s Sunken Meadow 5k mark with an 18:13.4 in November. “Everything has been coming together.”

She later won the 600 in 1:36.25.

West Islip’s Sierra Koehler won the 1,500 in 4:54.95 with an improved plan and a strong, extended kick. The senior spent most of the race in second, holding in reserve a kick that she unleashed in the final four laps to take control and put space between her and Mount Sinai’s Noreen Guilfoyle (4:57.54) and Miller Place’s Danelle Rose (5:00.85).

It’s Koehler’s first season competing indoors, and she said she’s seen significant time drops each time out.

“I’m still trying to figure out my splits and what it’s like to race on a 200-meter track, figuring out when I should kick and how to plan out my race,” she said. “It’s been a learning experience.”

Kings Park’s Alyssa Womack took the 300 in 43.08. Central Islip’s Alexandrea Harriot won the triple jump at 34 feet, 10 inches.