According to this map, https://cms.killington.com/sites/killington/files/2019-06/S19_Killington_Hiking_Web_Info1.pdf , the summit can be reached by three trails from the Killington resort side of the mountain: the A Trail, the C Trail and the E Trail. I did choose the C Trail because, according to the blog of a Killington resident who did try all existing trails, it is the one which offers the most scenic views during the ascent.

Upon arrival at Kilington resort, the most obvious feature is the large quantity of heavy road work equipment. The way to the C Trail trailhead is not obvious and I asked a Killington employee who indicated it to me. He did so, but when I reached the designated area, there was nothing there. From the map, it is obvious that the C Trail passes under a chairlift, so I buswaked it this way and had no problem finding it. The so called C Trail is a gravel road. There was a lot of construction work under way around the road, but not on the road. I never saw a C Trail indication. Actually, the C Trail is officially closed, but the first written sing that I spotted saying that was nearly at the top and intended for the descending hikers. E Trail and A Trails are opened, A Trail is not recommended for descending. I met Killington employes along the C Ttail and none of them notified me that the trail was closed. The ascent is not C Trail all the way because the signs indicating the C Trail had been removed. I reached the top without any incident despite the closed trail. Most of the way up offers no shade, so don't forget your sun hat. C Trail does offer a lot of nice views before the summit.

E offers goes through some wooden areas, offers some shade, and is not a gravel road all the way.

The food at the restaurant on top of the mountain is very expensive.

The Fire Tower has been transformed into a telecommunication tower, holds antennas, and a padlock makes it impossible to climb it legally.

I went down using the E trail.

The view worth the effort.