I get more questions about improving hip flexibility for hockey goalies than any other hockey training topic. I have dozens of mobility exercises that I like and this is not an exhaustive list. I am assuming that all goalies are doing some form of seated groin stretch, hamstring stretches, some form of standing groin stretch and some quad stretching. I tried to include in this article and video the three hip stretches for goalies that you are probably not doing.
I wrote this article for my colleague Kevin Neeld to post on his site, so click on the link if you want to learn more about these three stretches for hockey goalies.