Gifford gave Mayfield (17-1-1) the lead for good with a header off Harper's free kick in the 26th minute. Harper scored on a free kick in the 55th minute to double the lead.
Anthony Brandow recorded the shutout in goal with three saves to send the second-seeded Panthers into the final, where they'll take on top seed Maple Hill Saturday at 10 a.m. at Colonie High School. The Wildcats advanced to the final Tuesday night with a 1-0 win over Lake George.
Shane Brownell made eight saves for Galway, which had three players sent off midway through the second half.
Section II Playoffs
OESJ 5, Doane Stuart 0
Addie Brundage and Alexis Romeyn scored two goals apiece as the Lady Wolves cruised past Doane Stuart to reach the semifinals.
Julie Hickey also scored for top-seeded OESJ (15-2), while Abby Mosher assisted on goals from Romeyn and Brundage in the first half. The Lady Wolves finished with a 14-0 advantage in shots on goal, meaning that OESJ goalie Caitlin Handy wasn't even required to make a save in order to notch the shutout.
Louise Metz made seven saves for the Thunder Chicken.
Fort Ann 2, Fort Plain 1
Goals from Emily Jackson and Kate Jackson lifted fourth-seeded Fort Ann past No. 5 seed Fort Plain in the quarterfinals.
Fort Ann will face OESJ in the semifinals Friday at 7 p.m. in Lansingburgh in a rematch of the 2015 sectional championship game won by the Lady Wolves.
Northville 2, Saratoga Catholic 1
Kerrigan Groff scored the game-winner as the Lady Falcons rallied in the second half to advance to the semifinals.
Jenna Forsey scored the tying goal for Northville before Groff's winner. Taylor Johnson made five saves for the Lady Falcons.
Kristen Maher scored and Kara Colvin was credited with 12 saves for Saratoga Catholic.
Third-seeded Northville will face No. 2 seed Bolton in the semifinals Friday in Lansingburgh.
Mayfield eighth-grader Madison Relyea scored a dominant victory in the girls varsity race, finishing the three-mile course at Fort Plain Central School in 18 minute, 32.66 seconds -- 26 seconds better than runner-up Elaine Atanasova of Duanesburg.
Host Canajoharie-Fort Plain took second in the girls team competition behind Duanesburg. C-FP had four runners in the top 12 with Jordan Porter in sixth, Eliza Cechnicki in eighth, Michaela Stockwell in 11th and Cheyenne Munson in 12th.
The Fonda-Fultonville girls finished third as a team, led by Mariah VanAvery in fourth, Katie Dunham in fifth and Hailie LaPratt in 15th.
In the boys race, Fonda-Fultonville was the runner-up as a team behind Notre Dame-Bishop Gibbons. F-F had its five scoring runners all in the top 25 with Travis Geniti in eighth, Clane Newcomer in 11th, Aidan Zenzen in 19th, Thomas Etzkorn in 20th and Joe Curtis in 22nd.
Mayfield finished fourth as a team, with Josh Febbie's fourth-place individual result leading all area runners. Also for the Panthers, Tyler Newkirk was 13th and Connor Akowicz finished 16th.
Canajoharie-Fort Plain was led by Michael Hoffman in ninth and Hunter Congdon in 21st, while Tyler Brado took 17th to lead the way for Oppenheim-Ephratah-St. Johnsville.
-- Staff report