The final, played before a crowd of only 6,749 fans at the Home Depot Center, was anticlimactic after the USA and Canada had won their semifinal games on Wednesday night to qualify for the 2007 Women's World Cup.
Lilly scored the 117th goal of her international career when she stroked her spot kick past Canada keeper Erin McLeod after Hawaiian Natasha Kai was taken down in the box for a penalty. Leslie Osborne put the USA ahead in the sixth minute, but Canada equalized on Randee Hermus' goal shortly before halftime.
The victory extended the USA's current unbeaten streak to a record 32 games and kept its record of winning every Women's World Cup qualifying game intact.
In the third-place game, 19-year-old Monica Ocampo scored two goals to lead Mexico to a 3-0 victory over Jamaica and earn a berth against Japan in a playoff series.
Elsewhere, Argentina stunned Brazil, 2-0, on late goals by Eva Gonzalez and Maria Potassa to win the South America qualifying tournament. Both teams advanced to China '07.