This is the fastest route to reach the top of Spain (3.718m), a track with 18 kilometers and 1.400 positive meters, from Montaña Blanca´s Parking to the top (ascent and descent by the same way to the parking).
And for the up & down: https://www.strava.com/segments/17681585
Looks like the linked Strava segment for the ascent is actually for the descent. Apparently, the correct Strava segment is https://strava.app.link/RmJsL29nknb
Also, should a point to point FKT route be added, for the ascent section?