While it was cloudy and dismal on the west side of the pass, the Teanaway was only partly cloudy and perfect for a day out. The road up to FR 116 is a highway, so it's mostly snow free; there's some slush in areas, but that's about it. You can bring pretty much any car here and not have to worry. Like the previous reports say, park across from the fire station where you can find a spot along the road, and then walk a couple hundred feet to the trailhead. There were about 10 cars when we arrived at 10.45a, so it wasn't hard to find.
You start out on FR 116, and continue following it upwards for 1.7 miles until the summer trailhead. The sign can be hard to spot; my friend walked right past it before I pointed it out. You can save yourself some time and effort if you carry your snowshoes until the start of the actual trailhead, instead of strapping them on as soon as you get off the highway. The snow on FR 116 is well-packed. And for what it's worth, I didn't use gaiters on the entire hike. That being said, this would not be a fun hike to attempt without snowshoes. There were some places that, even with snowshoes on, we were sinking 1-2 feet into the snow.
Keep heading upwards, and you'll soon see sweeping views to the west of Cle Elum Lake and the mountains behind it, and to the east of Hex Mountain. For about 30 minutes or so, we encountered blizzard-like conditions out of nowhere, right before the summit. It didn't get much colder than 25F (without windchill), but we ended up putting on our extra layers while resting at the top. On the way back down, the wind had completely covered the trail, and we ended up losing it once or twice. A GPS could be helpful, but not necessary if you have some basic trail finding skills. We made it back down about 30 minutes after sunset.
I enjoyed snowshoeing here so much, that I wouldn't be surprised if I found myself out there again before the end of the season.