Tartaglia shot a four-under-par 68 — good for third place, while Peak to Peak's team score of seven-under beat the previous school record by 13 strokes put the Pumas in first place.
Behind the record-setting performance, Prospect Ridge's Walker Franklin and Kent Denver's Jackson Klutznick tied for first place.
Kent Denver (-5) came in second place.
Klutznick hit an eagle on 17, then birdied 18 to come in at six-under-par.
Franklin, who birdied the final two holes, did not have a bogey in the round.
Sterling wins Tri-Valley league tournament behind Lambrecht's effort
Bolstered by Brayden Lambrecht's score of six-under-par, Sterling won the Tri-Valley league tournament by eight strokes.
Lambrecht eagled a par-5 fifth hole to get to six-under on the day. His lone bogey came on a par-3 eleven.
Lambrecht shot five strokes better than Mead's TJ Shehee (-1). In the program's first year, Mead (+13) took second place.
Windsor (+14), Berthoud (+19) and Frederick (+26) rounded out the top five.
Windsor's Chandler Schulz tied for third place with Roosevelt's Tyler Severin.
- Discovery Canyon's Luke Trujillo started his boys state golf title defense with a win at the Spartan Invite.
- Lakewood's Jack Castiglia and Green Mountain's Gabe Goodman won individual titles at the Jeffco 4A/5A league match.
Find complete results of all the day's golf tournaments on this page.