I spent a little time yesterday afternoon taking a walk from the end of track down to the site of Trout Brook bridge and back. Here are some photos I took along the way.
1. Current end of track, at location 1 on the Mountain Extension, looking south toward Sheepscot. A few years ago someone (Fred I believe) put up markers every 300 feet from the area of the north mainline stub switch at Top of Mountain out to about 3000 feet north. End of track currently falls around the 1000-1100 foot mark.

2. Turning 180 degrees to look north along the right of way. Mike's truck is parked on the right-of-way.

3. Walking north, looking back at Mike's truck.

4. Turning 180 degress, the view looking north. Jeff Verney has cleaned up the right-of-way, pulling stumps and spreading gravel.

5. Looking south at the 1500-foot marker. The culvert for location 2 is visible just beyond the mark sign.

6. Standing at location 2, looking north past the 1500-foot marker toward the area of the slide (location 4).

7. Just south of the slide (location 4), looking south.

8. The repaired slide area at location 4, looking north. We now have a nice, wide right-of-way here. Jeff did a very good job.

9. Looking south through the repaired slide area at location 4.

For comparison, here is the same view posted by Mike January 16th in this thread.

10. Another view of the slide area, trying to convey the size of the repair.

11. Turning 180 degrees to look north along the right-of-way. We're at about the 1800-foot mark, where our well-traveled and well-used Kubota was parked for the day.

12. Looking south at the Kubota, with my back toward the pinch point/location 6.

13. Turning 180 degrees to look across the pinch point. Barely visible on the far left is the string line that marks where the block retention wall will be built. This is about at the 2100-foot mark.

14. Here is why this the pinch point. Barely visible just about the silt fence is Trout Brook, very close to the right-of-way. Also visible is the string line marking where the block retention wall will be built.

15. Looking south across the pinch point toward the Kubota. This view clearly shows how the road on the right-of-way has shifted over time into the hillside to the east to get by the loss of right-of-way here. The string marking the location of the wall is visible to the right.

16. One final look at the pinch point, showing the string line for the retention wall.

17. Mountain Mike prepares to install another section of silt fencing at location 8. We're looking south toward Sheepscot. This location is about at the 2400-foot mark.

18. Can you spot Mike setting the silt fence around location 8?

19. Mike setting the silt fence along the down slope edge of location 8.

20. Looking north along the right-of-way across location 8.

Next few locations are corrected thanks to Mike's later post. Sorry for my confusion!
21. Looking south along the right-of-way at the 2400-foot mark. Location
10 9 is just behind me.

22. Looking north at the same location, with the 2400-foot marker on the left and location
10 9 just beyond.

23. The washout at location
10 9. We're looking from the south side. This is the second of two locations to receive a 48-inch steel culvert. The first was location 1.

24. View looking south across location
10 9.

25. Looking south at the 2700-foot marker. Location
11 10 is behind me.

26. Turning to look north, here is the view at the 2700-foot mark and location
11 10.

27. Culvert at location
11 10. View is looking north.

28. View looking south across location
11 10.

I did walk the remaining 1100 feet or so to the Trout Brook bridge site. The right-of-way appeared to me to be in generally good shape between location 11 and the bridge site.
Hope these photos give a sense of all the work that's been done so far by Mike, Jeff, Jason and everyone else involved in preparing the right-of-way. It's really something to see in person.