This is a personal list of peaks where I didn't make the summit. I won't include the peaks I went back a second time to finish. For most of these mountains I was very near the summit when I made the decision to turn around, usually because of unfavorable conditions. It seems that many mountain enthusiasts push on when clearly the best choice is to call it a day.
Bailing off our attempt of Mount Herman
I always try to be acutely aware of the conditions as they change so that I can make the best decisions and minimize risk. I plan to live a long life always returning to the mountains and to do this sometimes requires admitting defeat. I have learned a lot from the trips in which I nearly made it and I don't consider them failures in any way. For instance I have turned around twice on Mount Baker because of a blizzard and avalanche conditions but it is not shown below because I did make the summit on a previous trip.
Turning around below the summit of Tinkham Peak 2006
Sahale Peak
2008
Nimbus Peak
2009
Bald Mountain (Sauk)
2010
Bald Eagle Peak
Goblin Mountain
Church Mountain
2011
Bald Eagle Mountain
Mount Russell
2012
American Border Peak
Mount Bretherton
2013
2016
None!
2017
Spire Mountain