Alhandra to Alcochete | Tagus Estuary Follow the mapped southbound line from Alhandra through the Tagus Estuary toward the Alcochete waterfront. Six approximate points measure about 21.62 km, close to the rounded 21 km listing and the map's roughly 20.88 km of labelled legs. This is an image-based reconstruction, not an original GPS track. The accompanying photo shows Alhandra's riverside park and marina, local start-area context rather than the full crossing. The route traverses major estuary channels and areas marked as a natural reserve; verify protected-area rules, tides, currents, shipping, weather and access before planning. Not for navigation. Geographic reference: OpenStreetMap contributors, ODbL (https://www.openstreetmap.org/copyright). Photo: Vitor Oliveira from Torres Vedras, PORTUGAL. CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0). Source: https://commons.wikimedia.org/wiki/File:Alhandra_-_Portugal_(241409895).jpg. Credit: Alhandra - Portugal. Route exported from the stored geo_path. Not for navigation. Alhandra riverside (approximate start)-9.005027,38.927678,0 Waypoint 2-9.004367,38.917411,0 Waypoint 3-9.013275,38.898928,0 Waypoint 4-9.026801,38.840621,0 Waypoint 5-8.965439,38.749085,0 Alcochete waterfront (approximate finish)-8.964779,38.747284,0 Alhandra to Alcochete | Tagus Estuary - route#route 1clampToGround -9.005027,38.927678,0 -9.004367,38.917411,0 -9.013275,38.898928,0 -9.026801,38.840621,0 -8.965439,38.749085,0 -8.964779,38.747284,0