The Lady Champions scored a dozen first quarter points, four more than the Lady Rockets, who put together a late run after falling behind 10-4.
Caitlin Yost, Taylor Patin, Kyleah Hengesbach, and Krista Chapman all scored one basket in the quarter for Forrest.
Chapman gave the Lady Rockets a much-needed scoring boost off the bench and she opened up the second quarter scoring with a bucket in the paint.
Amanda Patterson went to the floor and gained a tie-up at the other end and subsequently drained a long bomb three-pointer seconds later to give the Lady Rockets a 13-12 lead.
After a Patterson steal, Chapman put in a rebound to push FMS's lead to 15-12.
Two Forrest turnovers and scores for Cascade on consecutive possessions seesawed the lead back to the Lady Champs at 15-14, but Patin hit a short jumper for Forrest to re-gain the lead.
Cascade would come back again, taking a late 22-19 lead before Cassi Whitworth did what she has been doing the entire season: coming off the pine to nail a huge three-pointer to knot the contest at 22 at the half.
Hailey Collins swiped the ball from Cascade on the first touch of the second half and found Yost for another go-ahead bucket.
Taylor Barnes, Sara Beth Thomas, and Julie Jones scored on consecutive touches for Cascade to put Forrest in a 28-24 hole.
Hengesbach hit two-of-four free throws over the next couple of minutes to make it 28-26, before a Tamia Northcutt rebound and follow just before the third quarter buzzer sounded made it a 28-28 ballgame, entering the final six minutes.
Kristen Heath scored in the paint on a drive to bucket for Cascade to open up the fourth period, but Yost tied it up at 30 at the other end.
The Lady Champs went ahead 33-30 before a Yost drive and score cut the lead to one point.
Yost was fouled on the play, but her free throw spun out.
Patterson picked her up moments later when she hit the front end of a one-and-one to re-knot the contest at 33 and that would be the way the score would remain the next several minutes.
Maya Gaston made it 35-33 Cascade with a rebound and put-back, and after a Forrest turnover, Marissa Counts scored for the Lady Champs to make it a two-possession game with 1:24 remaining in the contest.
A single Yost free throw with under a minute to go cut the Cascade lead to three points, Jones hit the front end of a one-and-one to make it a four-point game once again.
Another Yost charity shot gave FMS hope with 35.8 seconds left and the Lady Rockets got a tie-up and the ball with a chance to tie.
FMS head coach Jeremy Jean called timeout after the tie-up, but the Lady Rockets coughed the ball up.
Jones was fouled at the other end and drilled her first attempt to make it a four-point game with under 10 seconds to go and Forrest called timeout again.
Yost got loose underneath and scored to make it 39-37 and Jean used his last timeout with 5.4 seconds left to try to get a steal on the Cascade inbounds play.
It was not to be as the Lady Champs executed the play and the game ended with Cascade on top 39-37.
Yost led FMS with a dozen points, Chapman ended up with a half dozen, Hengesbach, Patterson, and Patin scored 4 points apiece, Whitworth netted 3, and Collins and Northcutt finished with one basket each.
The boys game saw Cascade jump out to an early 7-0 lead before two Jesse Pruitt free throws broke the FMS scoring drought.
Chandler Sulcer drained a trey for the Champs to make it 10-2, but two late baskets by Alex Brewer made it a 10-6 contest after the first six minutes.
One free throw by Hawkin King at the outset of the second half was followed by a Brewer steal and score to make it an 18-15 contest.
From that point on, Cascade outscored the Rockets 34-9 the rest of the ballgame to win going away by the 24-point margin.
Brewer scored 11 points to lead Forrest in scoring, Pruitt ended up with 6 points, Tyler Adcock scored 3, Marshall McKee had one bucket, and Kendall Gillespie and King had one point each.