Not true! Why, I can walk almost a whole mile and stay in trees (except for crossing Irving Park Ave.) 
Google Maps
I live in an older blue-collar auto-worker’s neighborhood that was built on reclaimed farm and swampland in the 1950s. Half of my property is a copse of trees and two blocks to the north there’s a band of swampy woods so we get wild turkeys, snapping turtles, all manner of wild critters (which is nice) and, unfortunately, mosquitoes.
Sadly this area was heavily planted with ash trees in the 1950s, most of which have succumbed to emerald ash borer disease. The city has removed thousands of sick and dead trees in the last few years but there are still plenty of trees left.
It’s pretty much the same in Los Angeles, which is (or was) semi-arid grassland, so aside from willows in the wetlands and a few scattered great oaks, all of our trees are imported (including our famous date palms, which are originally from the Middle East.) There’s some pine forests way up in the mountains, like Big Bear or Fort Tejon, which is about a 100-mile drive away from my house.
Go straight over our west fence and travel west along the Jefferson/Clallam county line (which goes through Olympic National Forests and the Park) til you hit the Hoh, then go down the river to the Pacific and look for tsunami debris. All forest for many miles except where you are above treeline. This is not a casual stroll;)- it’s Sasquatch country, and a rain forest. There are bears, cougar, elk, deer, and mountain goats,of which they are the only recent killers of man.
Not very. I live in a subdivision that’s about 15 years old and was built on farmland. There’s only one tree substantially taller than the houses, and judging by old aerial pictures it’s been there since at least 1948.
City of Decatur, Georgia, part of metro Atlanta. Lots of trees - except for crossing roads, I could easily stay in the shade/under trees for most of a walk through the residential parts of it. If I meandered into downtown Decatur, there are still some trees, but not nearly as many. The city has lost a bunch of trees in the last decade or so as older houses are re-built, and to address that, the city is likely to implement a tree ordinance.
The greenness of the DC area is incredible. For example, driving north on the GW Parkway just past Key Bridge (i.e., around Spout Run), you are a quarter mile from busy Georgetown, half a mile from urban Arlington, and not far from the center of the capital city of one of the largest, most modern countries in the world, and yet looking up the Potomac River you’d think you were in the deepest Amazon rain forest or something.
If you would have seen our area 40 years ago you would have seen just farmland. But then houses came in and people planted trees. Now those trees are big. In fact too big and we have loads of problems when we get storms and they knock out power lines.
Now technically when a tree reaches over the roof of your house you should remove it but few people remove a tree unless it dies off.
Why should you remove a tree that is taller than your roof? That canopy helps keep the house cool in summer. I can understand removing a tree that may be leaning toward the house, and we’ve had a couple of large branches taken down because they overhung the roof too much, but I love that we have trees around the house - especially the ones that shade the front of the house in the afternoon and evening.
My inlaws love trees so much, when they built one of their houses, they literally notched the eave so they wouldn’t have to take down one specific tree. I often wondered what the folks who bought that house thought…
New England, and the folks around here have put some effort into establishing greenways and hiking areas. So I could head down to the tiny brook at the far end of my property and probably follow it a good long ways, leaving forested or at least wooded areas only to cross streets. It’d be a unpleasantly tick-filled and mosquito-y voyage if I did it once the canopy has leafed out, though.
**How forested is your neighborhood? **
Really, really forested. I live at the bottom of a logging road mainline leading up into hundreds to square miles of forest. NW corner of Oregon.
Forested. Lucky me! My back yard backs, unfenced, directly onto a large-ish regional park. (Mill Hill Park: “A little-known oasis of nature, this park exemplifies the exquisite beauty and ecological wealth of our region. Walk through cool woodland and climb to the summit (203m) for spectacular views.”)
Not the kind of park with flower beds and benches, but with hiking paths and forest. I can walk out of my house and head directly into the woods, and join up with the marked trails. It’s wonderful. Of course, this means that all the critters in the park can equally stroll into my little back yard and eat my flowers. It’s a tradeoff I’m willing to take.
Being “in the woods” is soul-restoring for me, and it’s really special to have green, wild, and treed space so close.
Despite being in a urban setting, the street we live on has quite a few trees that provide a good canopy of shade. Our yard has several mature trees as well. All in all, a quite nice retreat.
My neighborhood in Barcelona, not at all. There’s trees but they’re captive in parks, boulevards and sidewalks.
Barcelona itself and according to these two ladies from New Mexico I met yesterday might as well be the Canadian wilderness 
Then again, we were on the Montjuic cable car, with good views of Montjuic Park and Collserola. Both of them are quite tree-covered, and now in Spring a lot greener than the stereotypical image of New Mexico.
My home in the mountains, the town itself isn’t forested (by definition), but if I go down three floors… walk about 50 yards to the church… take a flight of steps down… and cross the river, I’m at the edge of the forest that covers the nearest mountain - mostly perennials. Walk upriver without having crossed it, and pretty shortly you get to a deciduos forest. Away from the river, fields of cereal or of oily plants (sunflower, linseed).
My brother in laws house in northern Wisconsin appears on goodle earth to be surrounded by hundreds of miles of forest. I got lost there a few years ago and just now realized how much trouble I could have gotten into. Growing up and living in the city all my life leaves me a bit naive about how big woods can really be.
Well I live between Central Park & Riverside Park, but other than parks there aren’t many trees on the Upper West Side of Manhattan.
Now - Not very. There is some woods (and apple orchards) north of town, and some unimproved parks (some trails and maybe a parking lot) in town, but those are many blocks away.
Growing up I lived on a dead end street with a ravine. When the house was bought (circa 1960) it was mostly cow pasture but by the time I grew up it was quite wooded. Could go for miles in the woods, usually to the (mostly abandoned) RR tracks. It is now a trail
http://www.co.outagamie.wi.us/planning/MapsImages/FoxCitiesTrails/Kaukauna.pdf
(I lived near the “1.2”)
Brian
Glad to know so many folks aren’t out of the woods yet!
In our area, you really can’t go much more than a mile before crossing some road or trail, but we’ve had little kids get pretty turned around and end up lost for half a day or so in the past.
I live in suburb, you can’t call it forested, but there are a LOT of trees in the yard. In fact, in summer you cant see our house using Google Earth … hidden by the trees.
In suburban Michigan, not a lot of woods as such but every yard has several trees. And, in Michigan, all of them are the right height!