It was 2 solid hours of driving. To make a daytrip by bicycle is probably not practical, although there is a train that runs a few times a day to nearby San Luis Obispo.
From there, it's only 25k along a road NOT separated from car traffic going over 100kph, or a longer route through another town.
I miss the ease and comfort of cycling in the Netherlands. :(
But I loved Morro Bay. We arrived just before the 4th of July Bike parade in Morro Bay California.
There were lots of participants and fun costumes!