The Portuguese Way (Portuguese: Caminho Português, Spanish: Camino Portugués) is the name of the Camino de Santiago pilgrimage routes starting in Portugal. It begins at Porto or Lisbon. From Porto, along the Douro River, pilgrims travel north crossing the five main rivers—the Ave, Cávado, Neiva, Lima and Minho—before entering Spain and passing through Padron on the way to Santiago de Compostela.

Urban trail running through San Francisco from Candlestick Point to Land's End.  About 16.5 miles.
https://crosstowntrail.org/

There is a Strava segment for the route.

87 miles from Ivinghoe Beacon-Tring-Wendover-Princes Risboroug-Wallingford-Goring-Streatley-Wantage-Avebury-Overton Hill

https://www.nationaltrail.co.uk/ridgeway

Note that the Ridgeway Challenge race is held on this route, so supported FKTs are very likely the race records (which are kept on the race website).