Originally Posted by
Rick@OCRR
Yes, we have some climbs out here in SoCal and they have some excellent ones in NorCal too. Ride Around the Bear century has 9,400 ft. of climbing and Breathless Agony Century has over 12,000. Several of the climbs out here take an hour, plus or minus.
So yes, I will now retract the advice on climbing training due to the low altitude of climbs in the OP's area!
Rick / OCRR
There could still be plenty of climbs, just not at altitude. Our Heart of Arizona Century has 6500 ft of climbing but never gets above 4900 ft.
As others have said, build up saddle time. if you can comfortably ride 70 miles, you can finish a century. Enjoy the ride and dont worry about average speed.