Oregon Junior Golf
Membership is available to golfers ages 8-18. You must be a permanent or summer resident of Oregon or Southwest Washington (including Clark and Skamania counties only).
Membership includes a Youth on Course Registration, Ghin Handicap Index as well as many other benefits.
There are also sanctioned tournaments which are smaller tournaments all over Oregon. These are open for juniors between 8 and 18 years old. Additional information and tournaments can be found on their website.
Per the Oregon Junior Golf Association website:
The mission of Oregon Junior Golf and the Oregon Golf Association is to introduce youth to the sport, encourage friendships and a life-long love for the game, provide competition and facilitate programs serving young golfers of all skill levels.
source: oga.org/events/junior