Randonnée d'Automne La Mer is an autumn road-cycling randonnée in Saint-Martin-Boulogne, France, offering 50 km and 70 km routes. Riders gather at the Foyer Communal G. Dumortier. Registration is in the morning, with starts staggered over a short period instead of a single mass start. The entry fee is modest: the public price is 5 EUR, with a reduced club rate, and some sources indicate a 2 EUR bib price for either distance.
The ride is organized by Rouelibre des Amis Saint-Martinois, the local R.A.S.M. club. The name suggests proximity to the sea, and both routes are designed for standard road cycling, not trail or mountain biking. Each distance features one refreshment stop, aligning with the randonnée format: a local club ride offering practical support, reasonable fees, and participants selecting either the shorter or longer loop. One past edition commemorated the club's 30th anniversary, highlighting the event's deep connection to Saint-Martin-Boulogne's cycling community rather than a large commercial race structure.