Pico dos Assobiadouros from Ribeira da Janela

The ER rises 18.5km through rolling hills and mountain roads, gaining 1,409m to 1,438m. The average gradient of 7.6% disguises ramps of 18.3% — the kind of gradient that turns plans into prayers. 10 hairpins punctuate the ascent, offering brief respite in the corners before the gradient bites again. Located in Madeira, Portugal.