Another single mom here. I know it costs $ but I get babysitters or use drop-in child care so I can participate in cycling events and do my weekend rides when it is not a dad weekend. I will skimp on other things so I can afford the child care, and my son loves his babysitter so I don't feel too guilty. Then again I have my kid 75% of the time so I don't feel so bad about leaving him to ride. Plus he thinks it's cool that I ride bikes fast!

I can't afford babysitting for a century ride but I do invest in half centuries and events that are <4 hours. Also can you possibly swap child care with mama friends every other weekend so you can get a long ride in every weekend?