# Event Details

- **Event Name**: B&O Unlocked: MARC No. 7100
- **Event Start and End Date**: Sat, 20 Jun, 2026 at 10:00 am – Sat, 20 Jun, 2026 at 04:00 pm
- **Event Description**: America 250: B&O Unlocked 

Celebrate America’s Story—One Railcar at a Time 

The B&O Railroad Museum’s annual Unlocked series returns—this year with a special tribute to America’s 250th anniversary. Each month, step inside a different piece of rail history and experience the stories that helped build a nation. In honor of this milestone, American Freedom Train No. 1 will be opened twice in 2026—January and July—offering a rare chance to celebrate the spirit of freedom and innovation that defines America’s rail legacy. 

You’ll also have the opportunity to step inside the newly restored B&O No. 3316 “Washington” Observation Tavern Car. 

Become a B&O Member and receive free admission for each collection piece. Don’t miss this opportunity to unlock the doors on these historic pieces! 




MARC No. 7100:

Wednesday 6/17, Saturday 6/20, Sunday 6/21 (10 am – 4 pm) 


This June, we are unlocking the MARC No. 7100! 

The MARC No. 7100 is unlike any other locomotive in the B&O Railroad Museum collection. Built by GM-EMD in 1951 and sold to the B&O Railroad that same year, the No. 7100 began its life as a model F7-A diesel locomotive. In 1980, the locomotive’s 1,5000 horsepower diesel engine was replaced with a “head-end power plant.” The No. 7100 was no longer considered a “real” locomotive, but rather an Auxiliary Power Control Unit (APCU). This means that the unit can control a train from the back end, but it lacks the power required to pull a train on its own.  

The No. 7100 serviced the MARC commuter lines until the late 1990s. Today, the APCU is a symbol of technological development and modern commuter rail travel. Don’t miss your chance to step inside the cab and experience the modern railroad from an engineer’s perspective!
- **Event URL**: https://allevents.in/baltimore/bando-unlocked-marc-no-7100/200030258660812
- **Event Categories**: 
- **Interested Audience**: 
  - total_interested_count: 3

## Ticket Details


## Event venue details

- **city**: Baltimore
- **state**: MD
- **country**: United States
- **location**: 901 W Pratt St, Baltimore, MD, United States, Maryland 21223
- **lat**: 39.28569
- **long**: -76.6327
- **full address**: 901 W Pratt St, Baltimore, MD, United States, Maryland 21223

## Event gallery

- **Alt text**: B&O Unlocked: MARC No. 7100
  - **Image URL**: https://cdn-az.allevents.in/events8/banners/533a2e1bb1436d96c9af3b2f55e755061891461b127ada091bd82f122894fd4c-rimg-w1024-h680-dc060505-gmir?v=1781733311

## FAQs

- **Q**: When and where is B&O Unlocked: MARC No. 7100 being held?
  - **A:** B&O Unlocked: MARC No. 7100 takes place on Sat, 20 Jun, 2026 at 10:00 am to Sat, 20 Jun, 2026 at 04:00 pm at 901 W Pratt St, Baltimore, MD, United States, Maryland 21223.
- **Q**: Who is organizing B&O Unlocked: MARC No. 7100?
  - **A:** B&O Unlocked: MARC No. 7100 is organized by National Museum of Railroad History & Innovation.
- **Q**: Who is this event for? Is it right for me?
  - **A:** B&O Unlocked: MARC No. 7100 is ideal for art lovers, trade professionals, collectors, and exhibition enthusiasts exploring the latest in their field. Whether you're a first-time attendee or a longtime enthusiast in Baltimore, this event is thoughtfully curated to deliver a standout experience worth every moment. If B&O Unlocked: MARC No. 7100 sounds like your kind of event, don't wait - spots fill up fast.

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