I like to climb Seymour and Grouse, two roads leading up to ski hills in North Vancouver BC. They both average around 7%, 10 km, 1000 m vertical gain with switchbacks; Cypress' grade is consistent and predictable and Seymour is *****ier and nastier, with steep sections that sneak up on you. I usually do em in a 69 inch gear; it's a little tall but more or less necessary for the ride back down.