This is a full day on a flat, traffic-free railway path that runs from Marbella towards the coast. The route covers 40 km with only 180 m of climbing in total, so there are no real hills to worry about. It is a touring-bike ride, and you set the pace: stop when you want, ride side by side, and take as long as the day allows.
The old railway line gives a wide, even surface with gentle gradients, which is why families, first-time riders and anyone returning to cycling tend to pick it. There are no junctions to manage and no cars to share the path with, so the effort stays low and the day stays relaxed.
Among the Ride Marbella tours this is the gentlest full day. The gravel loop and the big climb morning ask for real fitness, and the old town e-bike ride is shorter and built around sightseeing. The greenway sits at the opposite end of the scale, with time for breaks, photos and a long lunch.