Platja de la Marquesa sits on the Ebro Delta near Deltebre in Baix Ebre, Catalonia. It is a sandy, open beach with a quiet character and low visitor numbers outside peak summer periods. The water is generally calm and shallow near shore, although conditions vary with wind and season. High sun exposure is normal across the open sand, and natural shade is very limited, so sun protection and water remain important throughout a stay. Plan a visit between June and September for the warmest beach weather, with morning or late afternoon providing milder sun and often quieter conditions on the sand. Access is by rural tracks from the Deltebre side, ending with a flat walk over natural ground that requires suitable footwear. Stay on established tracks and respect local signs or temporary restrictions protecting the delta surroundings. Parking is informal near the track ends, followed by a short walk to the sand, so allow time for the final approach on foot. There is no direct public transport to the beach, so most visitors arrive by private vehicle via Deltebre and organise the return trip in advance. Access is open with no gated entry hours, and no admission fee is expected for general beach access. Facilities are minimal. Expect few or no toilets and showers directly at the beach, and little or no food and drink service along the shore. Bring water, food, sun protection and everything needed for a half-day stay, including a means to carry rubbish away. No regular lifeguard presence should be assumed, so swim with caution and remain near shore. The beach may suit self-sufficient families seeking quiet, but limited services and shade require preparation. Dog access rules may vary by season and local regulation, so verify locally before visiting with animals.