Roman Santos from Madrid, Spain / CC BY 2.0 / Wikimedia Commons

Gran Trail Peñalara — GTP 104K

The Sierra de Guadarrama's ultra, looping Peñalara, the Cuerda Larga and the Lozoya valley from Rascafría with three formats: GTP 104K (about 5,100 m D+), Trail Peñalara 60K and an 11K. Held in early summer; a key ITRA-pointed race for Madrid ultrarunners.

See how this race fits your training, the course profile and who else is going.

Registration on the organiser's site: grantrailgtp.com