It seems the state park boundary is intended here to be aligned with Smith Grade but they are not quite matched up. Probably one or the other is wrong; but which?

osm.org/node/418856692

shop=childrens ? What is the meaning of that shop value? What kind of services or products are sold here? Is anything from osm.wiki/Key:shop fitting? Maybe new value needs to be invented? Maybe this data is wrong and there is no shop here? Maybe it is not a shop but something else?

According to the Portola State Park brochure (available at http://www.parks.ca.gov/pages/539/files/PortolaRedwoodsSP_Web2014.pdf), the State Creek Trail does not cross the Park boundary. State Creek Trail is completely within the Park.

In addition, the State Park brochure indicates there is no public access for the small section of the Ward Truck Trail which is outside the park. I'm not sure if this applies to hikers.

Does this track still exist? Last weekend hiked there and didn't see any sign of it, from both ends...

Does this road connected to the general road network?

The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2023-01-21T19:25:03Z
POI name: Tyrolean Inn
POI types: cuisine-german amenity-restaurant
#organicmaps

Komoot has redirected me from Bear Creek Rd to Summit Rd, instead of keeping me on Bearcreek Rd on my way to down to Boulder Creek

Known as Rutherford Lawn

Note marshland here or along the railroad tracks.

The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2023-03-29T15:44:03Z
POI name: U.S. Bank
POI types: amenity-bank
#organicmaps