There's a gap in parcels here. Divide Block isn't actually contiguous.

I've written about this gate here:

https://www.reddit.com/r/openstreetmap/comments/1qxa58h/how_should_this_gate_in_sheffield_be_tagged/

Here's a summary:

From some photos I've seen, it looks like the gate there for vehicles, and bicycles and pedestrians need to go around it. I've seen photos of a trail around it, but also of a cycle barrier right next to the gate. Some of the photos have the gate as yellow; others grey.

Seems to me that the gate could be tagged as for vehicles only, private, and usually locked. And assuming the cycle barrier is still there, add that as a separate way, with a cycle barrier node on it.

The cycle barrier:

barrier=cycle_barrier
cycle_barrier=tilted
access=no
bicycle=dismount
foot=designated (or perhaps just yes)

The gate:

barrier=gate
access=private
locked=yes
colour=yellow

ridewithgps has a trail going NW from here. survey.

There are some huge Sequoia trees in the woods here.

There's a road ROW to the left. Probably not open, but could be a trail there.

ridewithgps heatmap shows riders still east of the stream. needs survey.

Looks like wood polygons need joining properly here.

Google Maps has this as Wardwell.

ridewithgps heatmap has trails a little west of mapped. survey.

Route of the creek looks wrong here. Doesn't match USGS elevation data.