Portobello to Port Seton Run Cross the Firth of Forth from Portobello Beach toward Port Seton Harbour along the nearly straight line shown on the source map. The two approximate endpoint coordinates are about 9.95 km apart, consistent with the map's 9.88 km total and the rounded 10 km listing. This is an endpoint-based image reconstruction, not an original GPS track; exact launch, landing and public access are unverified. The accompanying photo shows nearby Joppa Beach as local Edinburgh-coast context only, not the crossing. Check wind, tide streams, currents, shipping, weather and shore access before planning. Not for navigation. Geographic reference: OpenStreetMap contributors, ODbL (https://www.openstreetmap.org/copyright). Photo: Euan Nelson. CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0). Source: https://commons.wikimedia.org/wiki/File:Beach,_Joppa_-_geograph.org.uk_-_3228815.jpg. Credit: Geograph Britain and Ireland. Route exported from the stored geo_path. Not for navigation. Portobello Beach shoreline (presumed start)-3.1100734,55.9558065,0 Port Seton Harbour shoreline (presumed finish)-2.9551627,55.9727254,0 Portobello to Port Seton Run - route#route 1clampToGround -3.1100734,55.9558065,0 -2.9551627,55.9727254,0