Some of the lakes I enjoy fishing are off of I-90....Rattlesnake is always fun. I enjoy it because it is a very beautiful setting....no houses on the lake, awesome mountain views surround it, lots of osprey and eagles, and the fishing is usually pretty good. Also, Beaver lake and Pine although last I looked they didn't stock it yet this year. Anyone know why that is? Anyway, those are some of the standard lakes around here.
Given that opening day of the lowland lake trout opener is this weekend, most of the lowland lakes that aren't yr round will be good for the next 2-3 weeks. The whoppers are few and far between, but lots of 10-12 inchers if you find a good lake. Check the WDFW website for specific lakes. I used to fish McMurray, but haven't been there in probably 10 years.
What part of Seattle do you live in? If you live in the southern reaches and have a car, hopping on I-90 and heading to Issaquah for Pine and Beaver or past North Bend to Rattlesnake are good ideas. If you live in the north side of things, then you might consider Green Lake or even Haller Lake for a quick fix. I've fished all of these and found good things to be found in all of them. Haller is kind of fun, because it's well surrounded by trees, thus it stays well shaded when the sun is putting down fish at other places. I'm not sure how well the lake does for carry-over trout, but I suspect that it does better than people think.
When you say "closer to Seattle," could you give us a time-spent-driving frame? That would help those in the know. Giving us your Seattle neighborhood starting point will also help, as there is a significant difference between driving through downtown traffic and not having to.
Pine, Beaver, Alice, Rattlesnake, and Langlois are all about an hour (or less) from your location. Drive east on I-90 to find these lakes--and use a Gazetteer to find the roads. Greenlake is less, as well as Angle by SeaTac. I once caught a 21" rainbow out of Angle. That was the first trout I caught on a fly rod, and that happened in the first week of January, several years ago.
You might also consider some of the lakes of South King County. North Lake, by the Weyerhauser headquarter (just off of I-5 via, I think, the 320th Street exit) can provide some good fish. There is a deep spot that helps the carry-overs and plenty of lily pads to host bug habitat. Look up the stocking report on the WDFW website to see what you can expect there. I think triploids can be found there. The same can be said for Meridian, though you best have a map to figure out how to get there. That lake might take you to your 1 hour limit of driving, because of the stop lights getting there.