The simple answer: An FTP above 4.0 watts/kg. Old La Honda in Woodside is one of the Bay Area’s benchmark climbs: long enough to make you hurt but short enough where it’s not truly an endurance climb. Nonetheless, it sees like the climb that everyone competes on to have a reference point against everyone else.
To finish this 3 mile / 8% average gradient climb in 20 minutes puts you firmly in the top 10% of all entrants. As of June 2020, almost 27,000 people have completed it and tracked it on Strava.
My best time: 21:06, ranked in the top 10.3% of all cyclists, riding a Canyon Ultimate CF SLX with Ultegra DI2, Disc Brakes. Canyon’s lightest Ultimate frame. I brought along one full water bottle, a rear light, and a bike computer – my minimum, no-accidents-please setup. Low tire pressure at 60/65 front/rear PSI using GP5000 tubeless tires on Roval CL 32 wheels. My guess is the bike + accessories was around 19 pounds.
I probably weighed 142 lbs (I’m 5’6), having eaten no breakfast. Average power during the climb 261 watts, about 4.04 W/KG. My estimated FTP going in was around 3.87 W/KG at 250W.
To be able to shave off that final minute for a 20 minute time, I think that I would need another 10 or so watts, which would take me to 4W/KG.