Dutchwoman Marianne Vos was crowned Olympic points race champion after a stunning ride in the final on Monday.
Yoanka Gonzalez of Cuba secured the silver medal with Leire Olaberria of Spain winning the bronze, both riders securing their medals on the 10th and last of the race's intermediate sprints.
Vos, the reigning world champion in the 100 lap race, virtually sealed her first Olympic track cycling gold when she put her bike into overdrive to gain a lap on the peloton over six hard laps of riding on her own.
That gave the 21-year-old Vos a decisive 20 points, a tally of 30 and a 20-point lead over second placed Maria Luisa Calle of Colombia.
Vos is considered something of a cycling phenomenon, having won world titles on the track, on the road and in cyclo-cross.
And in an exciting finale to the race, she simply kept watch on her rivals to make sure none of them imitated her earlier feat.
A number of attacks came and went, and both Calle and Gonzalez were consistent in searching out the points.
But it took until the final few laps of the race for the silver and bronze to be decided.
Gonzalez and Calle sat in joint second going into the last of the 10 sprints, where five, three, two and points are picked up by the first four riders over the line.
However Gonzalez took command at the front of the peloton to add a further five points to her tally, taking her to 18.
Despite sitting on 13 points, Calle's bid for silver or bronze was far from secure.
In the event of riders finishing with the same number of points, the one who finishes ahead of the other on the final sprint takes precedence.
Olaberria had only 10 points ahead of the final sprint, but the Spaniard sprinted to second place behind Gonzalez to take her tally to 13, picking up the bronze and leaving Calle down in fourth place.