At the 2008 Summer Paralympics, Sophie won a gold and a silver medal for the 100 m breaststroke and 100 m butterfly respectively and later a gold for the women's 200 m individual medley. She then shared a gold medal for the 100 m backstroke. At 15 years of age, she was New Zealand's youngest athlete at the Paralympics, and the youngest ever New Zealander to win a medal
Following the 2008 Paralympics, Sophie was voted New Zealand's favourite Paralympian in a nationwide voting competition run by Mitsubishi Motors. For this she won a Mitsubishi VRX Outlander. She was made a Member of the New Zealand Order of Merit in the 2009 New Year's Honours, for her services to swimming. In February 2012, Pascoe became the inaugural winner of the Disabled Sportsperson of the Year award at the 2011 Halberg awards.
At the 2012 Summer Paralympics, Sophie competed in six events – the four in which she won medals at the 2008 Paralympics, plus the 50m freestyle (S10) and 100m freestyle (SM10) events. She successfully defended her 200 m individual medley (SM10) gold medal, breaking her own world record by four seconds with a time of 2:25.65. She also won gold medals in the 100 m butterfly (S10), where she bettered her silver at Beijing and in the process setting a new world record with a time of 1:04.43, and in the 100 m freestyle (S10), setting a new Paralympic record with a time of 1:00.89. Sophie won silver medals in the 50 m freestyle (S10),100 m backstroke (S10),and 100 m breaststroke (SB9).
In March 2013 Sophie broke her own world record for the 50m butterfly at the New Zealand Swimming Championships in Auckland, setting a time of 29.21 seconds.
On April 16, 2015 Sophie set the pool alight with an outstanding world record on the penultimate night of finals at the New Zealand open swimming championships, when she became the first S10 category para-swimmer to go under the one-minute mark in the 100m freestyle, winning the event in 59.77s to break the world record and gain her fourth qualifying swim for July's IPC world championship in Glasgow.
At the Paralympic Games in Rio 2016 Sophie brought home; Three Gold medals and two Silver medals.
For her outstanding achievements in the pool, Sophie has been awarded the New Zealand Order of Merit, the 2016 Halberg Sport New Zealand Leadership Award and the Halberg Disability Sport Foundation Disabled Sportsperson of the Year in 2011, 2012, 2013 & 2015. Her autobiography "Stroke of Fate" which speaks of great determination, courage and commitment was launched in 2013.
- 2017: Sport New Zealand Leadership Award; Sport Canterbury Supreme Award
- 2016: Three gold medals, two silver – Paralympic Games, Rio de Janiero
- 2015: Three gold medals – IPC World Championships
- 2014: Two gold medals - Commonwealth Games, Glasgow, UK
- 2013: Five gold medals - IPC World Champs; Halberg Award for Disabled Sportsperson of the Year
- 2012: Three gold medals; three silver – Paralympic Games, London; Halberg Award for Disabled Sportsperson of the Year
- 2011: Halberg Award for Disabled Sportsperson of the Year
- 2010: Gold medal, three silver medals, bronze medal - IPC World Championships, Eindhoven
- 2009: Four gold medals, three bronze medals – IPC World Championships – Rio de Janeiro
- 2008: Three gold medals, one silver– Paralympic Games, Beijing