The official notification hanging in the diner:

Deal Loyal Forest Diner Patrons,
After 66 years of serving the finest food in Howard County, the Forest Diner will be opening our doors for the last time on Monday, May 28. We would like to thank everyone who has allowed us to become part of their lives over the years. It has been our pleasure to serve each and every one of you.
While the Diner will be closing, we have partnered with Jilly’s Bar and Grill, which is right across the street in the Enchanted Forest Shopping Center, to continue the tradition of fine food and service that you have come to expect from us. So what does that mean? Quite simply, this means the Forest Diner without the dining car.
Starting on may 29, Jilly’s will be open at 6am to serve you. You will be able to get the same food as the Forest Diner, prepared and served by the Forest Diner staff, for the same price. The management team at Jilly’s is looking forward to exceeding your expectations for breakfast and lunch.
As part of their commitment to you, we would like for you to write your name and contact information in the notebook located by the register. Jilly’s is in the process of making a Diner Loyalty Card, which will entitle our loyal customers to receive special deals at Jilly’s.
Once again, thank you for being part of our family over the years. And while we will miss the dining car, we do hope to see you at our new home at Jilly’s.
Truly yours,
The Staff of the Forest Diner

Over the years, the Forest Diner has become entirely encased in later renovation, leaving the Silk City unrecognizable from the street.

neon sign

Inside, however, the original diner is in extremely good condition, having been protected from the elements for decades.

Inside

The diner is Silk City 5076, meaning it was the 76th diner built by Silk City in 1950. It was originally known as Gearhart’s Diner and was opened by a Bob Gearhart. It was sold in 1957 to William Carl Childress and was renamed the Forest Diner. He operated it until his death in 1998.
I’m not sure where the 1946 date that the diner and the news stories have been using comes from. I suppose this could have been a replacement for an earlier diner, bought either new or secondhand. I need to do some digging.

Waitress Ellen Jackson in the diner.

Neon with the Enchanted Forest in the background. The Enchanted forest was supposedly the nation’s second theme park, opening just after Disney.

Soft stuff is also closing with the diner

Directly next door to the Forest Diner- a Kullman which opened in 1998 as the Princess diner and was bought out a bit later by the Double T diner chain. There was a lot of head scratching in ’98 as to why they would open a diner next to another diner, and speculation as to its effect on the Forest diner’s business.

More stories on the closing
http://www.newspapersites.net/newspaper/howard-county-times.asp
http://ellicottcity.patch.com/articles/farewell-forest-diner
http://articles.baltimoresun.com/1998-10-27/news/1998300064_1_forest-diner-parlette-forest-owner