Blocked Trail in Lakeside!

Well that sort of sucks, it does not appear to be city property.

Is this the parcel in question? 

I tend to think that mob-style doxing is not very cool, but a polite letter to the property owner might produce an explanation.

I don't know the history of this particular parcel, but this does remind me of the bigger local issue of tax-forfeited land that the public has gotten used to using without the city having actually taken control of it.  Am I mistaken in remembering that parts of Lester Park are in that status?

Yes. It appears to be the same parcel. 16 acres, which is a good sized chunk. 
The Google Earth maps from the county are handy for finding out what vacant parcels are not part of the parks that they are adjacent to.  There are a number of undeveloped parcels on the west side of Seven Bridges road that people assume is Lester Park.

Yikes. I haven't seen it. Are you guys talking about the trail at the top of 43rd Ave East? There's been snowmobile trail appearing there as well. Maybe that's what set the property owner off?

One reason for the sign and fence is the increased (unauthorized) snowmobile activity.

Yes, the trail at the top of 43rd. I looked at the Google Earth link you provided and it doesn't look good. The city owns the lot just to the left. That was a great trail for Lakeside residents to get up to the Hawk Ridge area. I'm going to find the point of city property that abuts to Glenwood and bushwhack up that way I guess.

I wonder if we can use the "null, dedicated row" just to the right of Gordons property that goes strait up, although the two houses there on Norwood probably wouldn't like that.

Well, ROW in dedicated row means "Right of Way," so it would seem as if one has the "right" to make their "way" in that area. I believe it means if there were a paved street there, that's where it would be. There are a few other trails in the city that follow these.

The right of way is for utilities, not a road.   I'm related to the owner.  As far as I know, he was advised to place signs due to liability and other issues associated with snowmobile traffic.

This is why we can't have nice things.

+1 to E

You can thank the snowmobile riders for this. They ride up and down 43rd Avenue East on the shoveled sidewalks. I'm so happy that "he" closed access at the top of the hill. Fewer snowmobiles riding across my yard sounds good to me.

I've been in contact with people from the Parks and rec dept. We're hopefully going to run a path up Glenwood until the county/city land begins (about 500 feet) and build a trail from there that will hook up with the original trail that takes you to the top, none of which is on private land.