Also, the I-90 bridge over the Columbia at Vantage is super dangerous.
No shoulder - zero - and pretty heavy traffic.
There is no old highway bridge option.
The Milwaukee Railroad bridge downstream remains closed, too.
This is unfortunate because the old highway from Ellensburg to Vantage is super.
And the back roads on the east side of the river are also excellent for touring.
This is true about the bridge at Vantage. I rode over it in June of 1991 fairly early in the morning. There were 4 of us and we all waved out left arm vigorously as we rode. I heard of one person who hitchhiked over it by waiting on the freeway entrance for a pickup and when one stopped they threw the bike in the back and took the ride over the bridge and then got back on the bike and rode on!
Jamawani is right, the old road from Ellensburg to Vantage is cool, as are the old roads from Ellensburg to Cle Elum and you can also ride nice old bucolic roads west from Cle Elum for another 10 miles or so.
Again, I would be reluctant, to say the least, to ride this area into the west wind. I have seen people literally cry in frustration in the summer gales!