Summertown started quickly, beginning with a Sara Beth Smith 3-bomb on their first touch of the ballgame.
Morgan Long followed with two free throws for Summertown before Savannah Brothers got the Lady Rockets going with a three-pointer.
Megan Kilburn, who led all scorers in the game with 17 points, muscled in a basket in the paint for the Lady Eagles, making it 7-3.
Brothers nailed another three-pointer for Forrest, but Morgan Long scored at the other end for Summertown, keeping the lead at three points for the Lawrence County squad.
With 2:30 remaining in the first quarter, Kirston Holder drilled a long three-pointer to tie the game at nine before Morgan Long and Kenzie Kilburn buried three-pointers in the waning moments to give the Lady Eagles a 15-9 advantage after the first eight minutes.
Summertown would score the first three points of the second quarter before a Candace Daughrity basket kept Forrest in the game at 18-11.
Megan Kilburn and Holder commenced to trading baskets, but once again, the Lady Eagles pulled away on a four points late, split by Kenzie Kilburn and Morgan Long.
Summertown's 11-point halftime lead shrank to seven as Brothers nailed four consecutive free throws to begin the third quarter.
The Lady Eagles got the four points right back before Daughrity scored for Forrest, making it 28-19.
An Alissa Hunter drive and score began a 13-11 advantage for Summertown over the remainder of the third quarter, putting Forrest in a 37-26 hole with eight minutes to play.
After a Summertown timeout at the 4:50 mark of the final period, the Lady Eagles led 47-36.
There would be no scoring over the next two minutes before Hunter made it a 13-point game at 49-36 on a pair of free throws, setting the tone for no comeback by Forrest.
Summertown would outscore Forrest 6-1 down the stretch to complete the win, making it nine wins in the last ten ballgames for the District 12-A leaders.
Brothers led the Lady Rockets in the scoring column with a dozen points, while Holder scored seven, Daughrity six, Hannah Evans had five points, Hannah Phifer scored four, and Scarlett Roberson added three.
Behind Megan Kilburn's 17 points for Summertown was Morgan Long with 15, Hunter was also in double figures with 10, Smith scored a half dozen, Kenzie Kilburn netted five, and Lori Long added a deuce.