BANGOR — Momentum can be a fickle concept in sports, always there to change the direction and mood of an athletic contest, and often present to help one team forge to victory.

The Oceanside football team grabbed the all-important momentum at two key junctions — the start of the game and end of the first half — but those positive surges were not enough for the No. 3 Mariners to withstand an impressive offensive performance by No. 2 Hermon as the Hawks, literally and figuratively, stayed one step ahead of the Mariners en route to a 49-28 Class C North semifinal playoff win on a beautiful fall Friday night, Nov. 4 at Cameron Stadium.

With Jack Elwell (58) as protection, Oceanside’s Cohen Galley looks to pass against Hermon. Photo by Ken Waltz

The Hawks were in full ground-and-pound mode and got an eye-popping all-around effort from Gary Glidden, who turned in an incredible, yeoman performance. The senior running back finished with 323 yards on 41 carries, six touchdowns and a two-point conversion. He added three catches for 43 yards and a TD. He accounted for seven TDs and 44 of his team’s 49 points.

Oceanside’s Aiden Sergent, left, and Zeb Foster (21) look to tackle Hermon’s Bruce Coulter. Photo by Ken Waltz

Alas, with the Friday night’s outcome, the hoped for — at least by Midcoast high school football fans — meeting between No. 1 Medomak Valley of Waldoboro and No. 3 Oceanside of Rockland, longstanding area athletic rivals, in the regional final was not to be.

The Panthers beat No. 5 Winslow 21-13 on Saturday, Nov. 5 in the other regional semifinal clash at McMann Field in Bath.

Oceanside’s Zeb Foster (21) tries to make a catch against Hermon’s Chasen Flanders (1) and Bruce Coulter. Photo by Ken Waltz

With its impressive victory Friday night, Hermon will play Medomak Valley for the regional championship on Friday, Nov. 11 at 7 p.m. at Hampden Academy (change: originally scheduled for Nov. 12 at 1 p.m. at the same venue).

Earlier this season, the Hawks (7-3) lost to the Panthers (7-2) 14-12 and beat the Black Raiders (4-5) 37-7. Additionally, Oceanside (6-4) lost to Medomak Valley 35-32 and Hermon 38-36, but did not play Winslow.

Previously in the Class C North playoffs, Oceanside beat No. 6 Maine Central Institute of Pittsfield (3-6) 52-0 and Hermon downed No. 7 Hampden Academy 16-0.

From left, Oceanside coach Donald Prescott, Joseph Brown, Nate Thompson and Carter Galley. Photo by Ken Waltz

This season, Oceanside outscored opponents 374-235 and the Mariners’ previous three losses came by two, three and four points.

Hermon has outscored foes 305-164 in 10 games.

On Saturday, essentially, Hermon had too much Glidden, and just enough help from others. For the Hawks, quarterback Johnny Kokoska (5-of-10 passing, 73 yards, TD; 3 carries for 23 yards, two 2-point conversions), Bruce Coulter (3 carries for 15 yards), Alec Smith (carry for 5 yards), Bruce Coulter (catch for 5 yards) and Xavier Jelks (catch for 25 yards) contributed on offense. Gavin Coombs had an extra-point kick.

Hermon’s Gary Glidden (21) and Oceanside’s Hale Morris, among others. Photo by Ken Waltz

The Hawk defensive leaders were Bruce Coulter (7 solo tackles, 2 assisted tackles, pass break-up), Hunter Kenna (4 solos, 2 tackles for loss), Jaykob Dow (3 solos, 2 assists, TFL), Alec Smith (7 solos, 5 assists, quarterback sack), Max Hopkins (4 solos, 3 assists) and Kayden Patten (2 solos, 6 assists, TFL, sack).

For the Mariners, Aiden Sergent finished with two touchdowns and Cohen Galley and Gavin Ripley single scores. Robert Blair and Ripley had two-point conversions.

Oceanside’s Cohen Galley (7) looks for running room. Photo by Ken Waltz

Sergent (18 carries for 131 yards, 2 TDs), Cohen Galley (12 carries for 126 yards, TD), Ripley (2 carries for 26 yards, TD), Zeb Foster (2 carries for 18 yards) and Blair (2 carries for 4 yards) led the Oceanside ground game. Through the air, Ripley had three catches for 48 yards, Blair one for 32, Foster one for eight and Carter Galley one for four.

“Very tough week for us,” said Oceanside coach Sam Weiss. “The kids battled right until the end. After digging deep, and reviewing the film I let them down as the play caller, and head coach. I tried to force the passing game. Aiden and Robbie should have had triple the number of carries. In the entire game we only had two negative run plays, and both were [run-pass options] that we didn’t need.

“Defensively, we were in the wrong front to stop the power-I. We didn’t correct that mistake until halftime, and by that time we had already given up 28 points. We also gave up two fake punts on the same drive, both of which were completely preventable. I have to give credit where credit is due. Kyle Gallant did a phenomenal job, and had his team ready to go. Our goal as a team and program remains unchanged. We want a gold ball coming to the Midcoast as soon as possible. ”

“Guys played well, they played really hard,” said Hermon coach Kyle Gallant “Week 3, regular season [against Oceanside], we played the first half on fire, and let them back into the game in the second half. [Our players] took that to heart this week, and came out and played 48 minutes of Hermon Hawk football. Our offensive line played the best they have all year, with Alec Smith and Bruce Coulter lead blocking made our run game extremely hard to stop. Our QB, Johnny Kokoska, with our really talented skill players, were able to move the ball in the air effectively when [the Mariners] would load the box. Our defense made big plays when they needed to, and our crowd was electric all night. Just a great team win for us.”

Sergent finished a remarkable season with 162 carries for 1,392 yards and 20 touchdowns.

Mariner defensive statistics from the semifinal playoff game were unavailable.