That left the Vikings in tears and the five-time defending state champion Indians celebrating their sixth straight sectional Group 4 title.
It added another riveting chapter to one of South Jersey's best recent rivalries in any sport.
These two have won the last seven state Group 4 titles, with Eastern winning in 2005 and 2006, and Lenape taking the last five.
The Indians (20-3-1) will play in next week's state semifinals against the Central Jersey champion.
Eastern (23-2-1) had defeated the Indians twice in the regular season to win the Olympic Conference American Division, and the two were cochampions of the South Jersey Coaches Tournament after playing to a scoreless draw.
"It was a quality game," Eastern coach Jamie McGroarty said of Tuesday's matchup. "One of the teams had to advance, and, unfortunately, it wasn't our day."
The key to beating Eastern is limiting Rutgers recruit Madison Tiernan, whose skill level is at another level, even against a team such as Lenape.
Rachel Johnson, an Old Dominion recruit and as good a marking back as there is in South Jersey, was assigned to Tiernan, but the key to stopping her was help from other defenders. And Lenape gave her plenty of help.
Junior stopper Courtney Norton was among the main helpers. A Rutgers recruit, Norton also initiated the attack.
Lenape had the better chances, continually pushing on the attack, with Norton as the catalyst.
It seemed fitting that Lenape junior Rachelle Ross scored the lone goal, in the 52d minute. She has been a varsity player since her freshman year, and it seems as if she has been around forever.
Ross took a pass from Tori Prager and made a play only a select few could make. With her back to the goal, she whipped around in one motion, and fired from about 14 yards toward the far post for her 11th goal of the season.
The great players can feel defenders coming, and she did just that.
"You always have somebody on your back, so to get that quick shot off is really good or else you don't have it at all," Ross said.
Lenape coach Kevin Meder wasn't surprised at Ross's goal or the degree of difficulty.
"She does that type of play all the time," he said.
And actually, so does Lenape.
Even this year in a rare role of underdog, the Indians prevailed by beating a true championship-caliber team in a title game that soccer aficionados could appreciate down to the very last second.
Lenape 0 1 – 1
Eastern 0 0 – 0
Goal: Rachelle Ross.
Saves: L-Alicia Hampton 6; E-Imani Taylor 9.
Marc Narducci: ONLINE EXTRA
See and hear from Lenape's Rachelle Ross.
Contact Marc Narducci at firstname.lastname@example.org. Follow on Twitter @sjnard.