Pointe de Lapaz
Just south of Chamonix is Les Gaillands, a small lake and what may be the world's busiest climbing crag. We start at the parking lot, which is reachable by bus, train or in 15 minutes on foot from Chamonix.
Immediately settle in for a 1300 meter climb to the Pointe de Lapaz. If you come up short on water, food or energy, stop at the Refuge de Bellachat before the final 200 meter ascent.
The proper Pointe de Lapaz trail stays just off and west of the ridge but it is possible, and recommended for the sure footed, to stay on the ridge crest. A number of faint paths make their way to the actual ridge from the main trail. Traverse south on the ridge where it turns into golf course quality grass and abundant napping spots with unrivaled views of Mont Blanc.
After a good long sit, your quads have some downhilling to do. The trail back to Les Gaillands is almost 100% running.
Start: 45.912765, 6.846584
This is a long climb and a long descent. Consider the Refuge de Bellachat as an aid station.
On the descent, pay attention to the GPX track, there are a lot of turns that lead in the wrong direction.