I figure I can chime in on this one, since I live in Seattle, and I've attended events put on by the Portland, Spokane, and Vancouver area clubs, as well. However, I've only lived in Kansas City and Seattle, so I don't know how it compares to Philly.
There aren't meets
every weekend in Seattle, but I'd say that over the course of the year, there's a pretty healthy schedule. Cascade OC organizes the eight-event Winter Series that runs November through February, the six-event Ultimate Series that runs March through July. We'll have an A-Meet in the summers of 2008 and 2009. Plus the annual Bog Slog, Vampire-O, National Orienteer Day, and Founder's Day events. There are usually about 8-10 urban orienteering meets throughout the year, mostly in the spring and summer. The smaller club here, Sammamish OC puts on a four-event series on Wednesdays in the summer, plus another one or two events a year. There's also a canoe orienteering event in Seattle this summer.
Regarding your question about training opportunities for teenagers, I think Seattle is an
excellent situation. Organized alongside the Winter Series is the Washington Interscholastic Orienteering League (WIOL), which features eight events with leagues for Varsity, JV, and younger runners. Our largest events of the year are the Winter/WIOL events. Several of these WIOL kids are tops in the country in their age groups, and on AttackPoint, and I expect them to chime in any minute about Seattle's orienteering opportunities for kids.
Links for Seattle orienteering:
Cascade OC:
http://www.cascadeoc.org
School League:
http://www.WIOL.org
Street Scrambles (urban orienteering):
http://www.streetscramble.com
I've been to some events hosted by other regional clubs.There are two clubs in Oregon (CROC and ORCA) and they seem to have a lot of events. If they ever have anything on the Dutchman Flats map, make sure to go. It's amazing terrain.
ORCA:
http://www.forestrunner.com/cgi-bin/schedule.cgi
CROC:
http://www.croc.org/events/Schedule2008.php
I went to a the Vancouver Sprint-O Training Camp a few months ago, which was an outstanding event. And there's more than just Vancouver. Victoria and Kamloops also host events, too. You can find the schedules for all BC clubs here:
http://www.orienteeringbc.ca/
It's also worth keeping an eye on the club in Spokane (EWOC), too. They had a two-day event last summer, and that's an easy drive.
http://www.ewoc.org
I hope this helps.