The new segment from where it splits off the old trail is approx 0.9 miles long with 289 ft of ascent and 160 ft of descent while going clockwise.
The spur road that connects to Rice Road is approx 0.3 miles and has 103 ft. of elevation gain.
The whole new section is well marked and goes through second-growth timber like the rest of the hike. There is one bridge over a creek and overall the new section is a nice addition to the older part.
I accidentally paused my GPS so my hike was 5.5 miles but as far as I can determine it was 5.8 miles in the end without accounting for GPS jitter (meaning that it is 5.8 miles at the most)
I don't have a nice set of National Geographic topos, but I've created a map close to your original map without the useful information in the margins of the map and you are welcome to use that on the Field Guide page. I zoomed the map out a bit since the information in the margins is missing.
I forgot to commit my changes to OSM, so it looks a bit of a mess in there right now but should be better in a few days.
I also have 18 photos from the trip which can be seen here. Feel free to use any, all, or none of them on the Field Guide page too.
https://www.dropbox.com/sh/0qzrkyvhrzm7 ... eSP9a?dl=0