The women's 100 metre breaststroke competition of the swimming events at the 2011 Pan American Games took place on October 17, at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico.Guadalajara 2011 sessions The defending Pan American Games champion was Michelle McKeehan of the United States.

This race consisted of two lengths of the pool, both lengths being in breaststroke.Swimming technical manual

Records Prior to this competition, the existing world and Pan American Games records were as follows: World record1:04.45Federal Way, United StatesAugust 7, 2009Pan American Games record1:07.78Rio de Janeiro, BrazilJuly 17, 2007

Qualification Each National Olympic Committee (NOC) was able to enter up to two entrants, providing they had met the A standard (1:13.3) in the qualifying period (January 1, 2010 to September 4, 2011). NOCs were also permitted to enter one athlete providing they had met the B standard (1:15.5) in the same qualifying period.

Results All times are in minutes and seconds.

KEY: q Fastest non-qualifiers Q Qualified NR National record PB Personal best SB Seasonal best

Heats The first round was held on October 17.Women's 100m Breaststroke Preliminaries Rank Heat Lane Name Nationality Time Notes 1 3 5 Ashley McGregor 1:09.24 QA 2 2 4 Ashley Wanland 1:09.26 QA 3 2 5 Alia Atkinson 1:09.28 QA 4 3 4 Annie Chandler 1:09.57 QA 5 1 4 Kierra Smith 1:10.15 QA 6 2 3 Tatiane Sakemi 1:12.06 QA 7 3 3 Arantxa Medina 1:12.79 QA 8 3 6 Julia Sebastian 1:12.88 QA 9 1 7 Trysha Centeno 1:13.04 QB 10 3 2 Daniela Victoria 1:13.17 QB 11 1 6 Mercedes Toledo 1:13.20 QB 12 1 3 Danielle Beaubrun 1:13.29 QB 13 2 6 Monica Alvarez 1:13.36 QB 14 1 5 Carolina Mussi 1:13.75 QB 15 2 1 Isabel Riquelme 1:13.76 QB 16 3 1 Lisa Blackburn 1:14.33 QB 17 1 2 Mijal Asis 1:14.71 18 2 7 Patricia Casellas 1:15.56 19 3 7 Alicia Lightbourne 1:15.66 20 2 2 McKayla Lightbourne 1:15.95

B Final The B final was also held on October 17. Rank Lane Name Nationality Time Notes 9 6 Danielle Beaubrun 1:10.63 10 2 Monica Alvarez 1:12.25 11 5 Daniela Victoria 1:12.31 12 3 Mercedes Toledo 1:12.54 13 4 Trysha Centeno 1:12.87 14 1 Isabel Riquelme 1:13.99 15 8 Lisa Blackburn 1:14.75 16 7 Carolina Mussi 1:15.63

A Final The A final was also held on October 17.Women's 100m Breaststroke Final A Rank Lane Name Nationality Time Notes 6 Annie Chandler 1:07.90 5 Ashley Wanland 1:08.55 4 Ashley McGregor 1:08.96 4 3 Alia Atkinson 1:09.11 5 2 Kierra Smith 1:10.23 6 7 Tatiane Sakemi 1:11.46 7 1 Arantxa Medina 1:12.29 8 8 Julia Sebastian 1:12.60

References