I’ve done a few rides of 150+ miles before. I cycled from Policastro Bussentino to Serra San Bruno in May without a problem. And while it wasn’t over mountains I wouldn’t have called it a flat route. In fact in May I also cycled 155 miles from Busseto to Cherasco although that was pretty flat. But today’s ride from Andorra to France will remain imprinted in my memory for years to come.