Rivers Flowing Through Paris: The Seine & The Marne

Two rivers define Paris’s geography and history:

1. The Seine (La Seine)

• Role: The city’s arterial heart. 777 km (483 mi) long; source in Burgundy, mouth at Le Havre (English Channel).
• In Paris: 13 km through the center, dividing Rive Droite (Right Bank: Louvre, Champs-Élysées, Montmartre) and Rive Gauche (Left Bank: Latin Quarter, Eiffel Tower, Saint-Germain).
• Features: 37 bridges (oldest: Pont Neuf, 1607); Île de la Cité & Île Saint-Louis (natural islands); UNESCO Banks (1991).
• Commercial/Recreational: Bateaux Mouches tours, freight barges, riverside quais (pedestrian/cycling), Paris Plages (summer artificial beaches).

2. The Marne (La Marne)

• Role: Major right-bank tributary. 514 km (319 mi); source on Langres Plateau.
• In Paris: Joins the Seine at Charenton-le-Pont / Alfortville, on the eastern city limit (12th/13th arrondissements).
• Significance: Historic defense line (Battle of the Marne 1914/1918). Guinguettes (riverside dance halls) inspired Impressionists (Renoir’s Luncheon on the Grass).
• Today: Parc de la Villette (Cité des Sciences), Base de loisirs de Jablines (water sports), cycling paths.

Minor Waterways

• Canal Saint-Martin (4.5 km, locks, trendy neighborhood).
• Canal de l'Ourcq (feeds Saint-Martin, from Marne).
• Bièvre (now mostly culverted; historic tanneries).

The Seine is Paris’s soul; the Marne its green eastern lung. Both shaped the city’s layout, trade, art, and romance.