2009-10: Martin Reway began his first full season in Slovakia U18 hockey as a 14-year-old after making his debut with MHK Dolny Kubin's U18 team the previous season. He had 70 points in 26 games for MHK – scoring 32 goals with 38 assists and 24 penalty minutes.
2010-11: Reway played 10 games for MHC Martin in the Slovakia U20 league and was the leading scorer for the club's U18 team. He represented Slovakia at the U17 level in the 2011 Europe Youth Olympic Festival and the 2011 World Hockey Challenge in Canada. Reway scored 5 goals with 5 assists and was +3 in team U20 games. Playing in just 20 of 43 games for the MHC Martin U18 team, he scored 13 goals with a team-high 22 assists and had 65 penalty minutes. Reway scored 1 goal with 2 assists in three games at the EYOF and had 1 goal with 1 assist and 6 penalty minutes in three games at the WHC.
2011-12: Reway moved to Sparta Prague in the Czech junior league – skating for the club's U20 and U18 teams – and played for Slovakia in the 2012 U18 Division 1 Group A World Junior Championship. He scored 2 goals with 4 assists and was +4 with 2 penalty minutes in five U20 games. Reway was the leading scorer for Sparta's U18 team with 12 goals and 39 assists, second most in the league. He was +27 and had 42 penalty minutes in 25 games. He led all scorers in the playoffs with 8 goals and 16 assists in nine games and was +8 with 12 penalty minutes. Sparta Prague lost to HC Vitkovice in the finals. Reway was Slovakia's second-leading scorer as the team dominated the second-tier tournament on home ice in Piestany — earning elevation to the top division for 2012-13. In five games Reway scored 4 goals with 7 assists and was +7 with 8 penalty minutes. He was the fourth player taken in the first round of the 2012 CHL Import Draft (by Gatineau, QMJHL).
2012-13: Reway skated in 47 games for Gatineau in his first season in North America – missing eight games late in the season due to a shoulder injury. He scored 22 goals with 28 assists and was -1 with 56 penalty minutes for the Olympiques. Gatineau reached the playoffs despite finishing under .500 and advanced to the second round. Reway led the Olympiques in scoring in the playoffs, scoring 1 goal with 11 assists in 10 games, and was +7 with 20 penalty minutes. He represented Slovakia in the 2013 U20 World Junior Championship and had 2 assists; finishing -4 with 2 penalty minutes. Reway was ranked 91st amongst North American skaters in Central Scouting's final rankings and was selected by Montreal in the fourth round (116th overall) of the 2013 NHL Draft.
Reway will return the QJMHL with the Gatineau Olympiques and has another two years of development at the junior level. He will likely represent his country at the 2014 WJC tournament. The 18-year-old is a high risk prospect with top-six potential but will need to gain more strength, size and physicality to his game in order to play at the pro levels.