I rode OLH a couple of weeks ago, after hearing about its "legendary" status and compared to anything I ever found in the UK it is the longest hill I have climbed. Not knowing quite what to expect, I didn't go at it full bore, but managed the climb from bridge to stop sign in 24 min 30 s. I hope to do better next time.
The return down 84 is pretty good, although I might try the Page Mill road route.
Cheers,
Ed
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Get a bicycle. You will certainly not regret it, if you live.