This is the best : higher running route of all trail running stations, with its highest point at Taillefer's summit, 2857m high.

This high montain running tour should not be done with bad weather.
You can divide the tour and stop at the station right after the Grand Serre climbing, as a little red level tour. You can also getting down at the Pas de la Mine, avoiding the last tour to the Taillefer summit.
You can either go straight from the station to the Taillefer, it is a red level tour as well. If you make it all, it is a black level tour.

There are some dizzying part in the last loop from the Pas de la Mine to the summit of Taillefer : you need to be used to trail running. 50m before the Pas de la Mine, take the little path on your right side, marks are there (sometimes without N°3), but the path may have only little trace.
Cairns and white and blue traces guide you, please pay attention to them, especially the Lemay lake area that you have to bypass on the left bank.
O
nce at the pass, it is a return-trip to the top on the same way. Please mind your steps on the little path following the ridge on the way back.

On your way, you'll find amazing view points, from Grand Serre dizzying ridge, in the climb to Taillefer, to end to an absolutely breathtaking panorama from the top of the Taillefer, over all Grenoble and Valbonnais region, as well as Oisans, Ecrins, Belledonne, Chartreuse and Vercors ranges.
Equipments : Play area, Picnic area, Bar, Toilets, Public WC, Car park, Restaurant,

Admission fee : Free access. Free pricing rundown at the tourist office.

Opening : From 01/05 to 31/10. Depending on the snow cover.

Area : Matheysine