2010-11: Sam Reinhart, selected by Kootenay in the first round (15th overall) in the 2010 WHL Bantam Draft, made his WHL debut as a 15-year old. He appeared in four regular season games, seven playoff contests, and one Memorial Cup game with the Ice. Reinhart scored 2 goals and was +4 in the regular season and was -1 with no points nor penalty minutes in five post-season games. He was the second-leading scorer for the BC midget major champion Vancouver NW Giants and represented British Columbia in the Canada Winter Games. He scored 38 goals with 40 assists and had 6 penalty minutes in 34 games. In five playoff games he scored 5 goals with 4 assists. Reinhart was the second-leading scorer at the Telus Cup behind teammate Alex Kerfoot, finishing with 7 goals and 13 assists in seven games. The Giants lost to Lac St-Louis in the bronze medal game. Reinhart won a gold medal at the Canada Winter Games – scoring 4 goals with 7 assists and 2 penalty minutes in six games.
2011-12: Reinhart was the second-leading scorer for Kootenay behind his older brother Max Reinhart (Calgary) and was named the WHL's Rookie of the Year. He scored 28 goals with 34 assists and was +16 with 2 penalty minutes in 67 games. The Ice finished fourth in the Central Division before being swept by first place Edmonton in the first round. Reinhart scored 1 goal with 1 assist and was -2 in four playoff games. He represented Canada in the 2012 U18 World Junior Championship and played for Canada Pacific in the 2012 U17 World Hockey Challenge. Reinhart scored 2 goals with 4 assists and was +1 as Canada captured the bronze medal at the U18 WJC. In five games for Canada Pacific he scored 4 goals with 6 assists and 2 penalty minutes.
2012-13: Reinhart was Kootenay's leading scorer in his second season with the Ice and was a team captain for Canada's U18 team in both the 2012 Ivan Hlinka Memorial and 2013 World Junior Championship tournaments. He scored 35 goals with 50 assists and was +8 with 22 penalty minutes in 72 WHL games. Kootenay finished fifth in the Central Division and lost to Edmonton in the first round. Reinhart had 1 assist and was -8 with 4 penalty minutes in five playoff games. He scored 3 goals with 5 assists and was +7 in five games as Canada won the gold medal at the Ivan Hlinka tournament and scored 3 goals with 4 assists and was +7 in seven games for Canada as the team captured a gold medal at the U18 WJC.
2013-14: Reinhart was named a team captain for Kootenay in his third WHL season.