I ran my first London Marathon in 1991. My wife and I ran in 2002, although not together. Our younger son ran it with me in 2007 and 2010. I ran it with our elder son in 2013 and with our daughter in law in 2014. Also, last Summer, three generations of us (myself, son and grandson) took part in the same parkrun.
I also ran a recent parkrun with my son and grandson. Earlier in the year I did a fun run with my other son and grandson. Just need to get the 4 of them together with me now