Amazing views from the top, but we enjoyed our hike up more. Very scenic, wildflowers everywhere - we also spotted some marmots! Still some snow patches around. There was a herd of cows that was very photogenic, and we got to appreciate the scale of the mountain! The sheer height of the climb is spectacular, but there are many interesting rock formations and jagged outcrops as well. If you have the fitness and the time, I highly recommend walking from the bottom.
It is only three kilometres from the cable car station (where there is free parking) to the top of Mont du Sancy, but every step is uphill. We left at 10am and got back to our car at 2pm, but we did stop quite a lot for photos. It is a demanding hike, and there are a few places where the footing is quite poor (lose slippery rocks). I am of average fitness and I was huffing and puffing quite a bit! Also there are quite a few leeches around so you might want to carry some matches. Wear good shoes. Many people had crampons.
If you do elect to take the cable car, you still need to walk up the 800 or so steps to the top. These are wooden and have hand railings - sometimes the spacing between steps is irregular and annoying, but in general it is an easy trip for those of normal fitness.
If unsure of the route, visit the tourist office in Le Mont-Dore. They have free maps of the town and Mont du Sancy, and explain the route to you. They also have hiking maps you can buy of the region, but the free one was more than enough for this trip.
If you own or manage montee du Sancy, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.