20 km walk organized by Lydie Dobin, Patrice Jacquelin and Monique Jacob at a pace of 4 km per hour.
RDV Gare du Nord at 8.15 am, departure at 8.30 am line H Pova direction Persan Beaumont, Arrival at Mery sur Oise at 9.09 am
Fuller description later
Return from Mery sur Oise station: 16:19 on line H Avop, arriving at Gare du Nord at 16:59, train every 1/2 hour