By 2006, she finished 3rd at the NCAA Women's Outdoor Track and Field Championships, setting personal bests three times during the competition.

[7] At the 2010 IAAF World Indoor Championships, Montaño won her first international medal, a bronze, in the 800 m, finishing with a personal best time of 1:59.60.

[8] At the 2011 USA Outdoor Track and Field Championships, Montaño won the 800 m title in a time of 1:58.33 to defend her 2010 crown.

[9] At the 2012 Olympics, the front running Montaño held the lead until the kickers ran past her in the closing stages of the race, ultimately holding on to fifth place.

Alysia garnered attention in June 2014 by competing in the USATF's USA Outdoor Track and Field Championships while eight months pregnant.

[15] A year later in June 2015, Alysia returned and won the 800 meters final of the US Trials and qualified for the World Athletics Championships 2015 in Beijing.