Here is a pic for you.  The red blob is me at the start of the Passo Fedaia (Marmolada), in the dolomites of Italy.  The climb stats are 14km @ 7.5% average, the first 9km are around 4% which mean the last 5km are averaging >12%.  Now I know why they have a little chapel at the bottom of the climb!!!!!! This ranks as my worst ever day on the bike, I’ve never suffered like this before… but the joy at getting to the top was well worth it. – David