6 miles each way. Going in, 0.5 mi residential, .5 mi downhill on a light arterial and 1 mi urban industrial which takes me to a MUP for the final 4 miles. The MUP (Burke-Gilman in Seattle) is decent for the 1st half, but is getting pretty busy on the 2nd half due to student traffic (the University is back in session) and some long-term construction at the half-way point is a real pain. Other than the home stretch, it's all pretty flat though (any alternatives force a steep climb over a ridge and higher traffic volume). Coming back I usually skip the arterial and go the last mile on residential (since I'm going uphill at 10mph rather than downhill at 30!)