Souss-Massa National Park
It is not exactly convinient to get to Souss-Massa by public transport. The most accessible entrance is from Massa. Take bus 60 from Innezgane (see Agadir, 20 Dh) until the end, which is just a little further than the grand taxi station (25 Dh to Agadir). The entry is about 5km from the bus stop, just continue the road until a sign leads you to a non-sealed road close by the river. There is very little traffic, don’t rely on getting a lift there. From the entry it is about 3km to the river mouth and the dunes.
Walking on feet, entry is free of charge. Guides are available at the entrance.