Portland area 7-10% grade long hills?

[boy in a kilt]

If you live around the Oregon City area, there are hills aplenty.

Riding outside of town, take Redland road out to Henrici (first left past the light in redland). Get that far and you've done a decent one already. Hang a right on Henrici and ride all the way to beavercreek road.

From there, you can head down into town and across the bridge into west linn. If you head toward willamette district, go under 405, then hang a right and climb that monster (can't remember the name and I used to work on a tree farm up there...). Eventually, it'll take you back into west linn but I can't remember how.

Or, take Redland Road all the way to hell and gone out to estacada. If you come back through barton, it's a nice reprieve.

If you just want to do repeats. Linn Ave in Oregon City is longish. Ditto South End Road. In fact, you can do those two as a long circuit.

Also, Theissen road in milwaukie is a 12% grade for about a half mile. A good circuit could be start at the corner of webster and theissen, head down thiessen toward oatfield. Left on Oatfield to Strawberry. Left on strawberry and go up for a while.