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Seven Valleys in York County, Pennsylvania — The American Northeast (Mid-Atlantic)
 

Howard Tunnel Protected

"Shoot any rebel on sight"

— Gettysburg Campaign —

 
 
Howard Tunnel Protected Marker image. Click for full size.
Photographed by Mike McKeown, January 11, 2026
1. Howard Tunnel Protected Marker
Inscription. At mid-afternoon on June 27, 1863, Confederate raiders raced from left to right across the ground in front of you as they advanced on Howard Tunnel, a 300-foot-long railroad channel carved through solid rock.

During the Confederate invasion of Pennsylvania that would climax at Gettysburg, southern troops spread across the countryside to cripple communication and transportation routes, including the Northern Central Railway. Confederate Lt. Col. Elijah White's "Comanches" were sent to this area to damage or destroy rail facilities, railroad bridges, and the tunnel, a vulnerable chokepoint on the rail line.

To defend against the raiders, Union Col. William B. Thomas's 20th Pennsylvania Volunteer Militia regiment (an emergency regiment raised only 10 days earlier) had been sent to the area. Thomas assigned 400 men to defend the tunnel. The men erected earthworks on the surrounding hills and dug rifle pits atop the tunnel entrance. As they waited, they could hear unnerving echoes of pistol fire from the south, where 1kr1iite's raiders had attacked Hanover Junction. Black smoke and burning embers rose into the air
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as the raiders worked their way north, burning railroad cars and bridges. Col. Thomas ordered his men to "Shoot any 'rebel on sight."

But seeing the bristling strength of the defenses, the Confederates decided to bypass the tunnel and continue north. They were on a Mission of destruction, not of battle, and could not afford to get bogged. down in fighting. The tunnel spared, Col. Thomas marched his men northeastward to join Union forces defending Wrightsville and the bridge over the Susquehanna River.

(captions)
Howard Tunnel, 1870. -Collection of Robert L. Williams

Isaac N. Snively, assistant surgeon, 20th Pennsylvania Volunteer Militia. Courtesy Ronald S. Coddington Collection

Walk or bike the Heritage Rail Trail for 2.1 miles to see and explore Historic Howard Tunnel.

 
Erected 2025 by Pennsylvania Civil War Trails.
 
Topics and series. This historical marker is listed in these topic lists: Railroads & StreetcarsWar, US Civil. In addition, it is included in the Pennsylvania Civil War Trails series list. A significant historical date for this entry is June 27, 1863.
 
Location. 39° 52.375′ N, 76° 44.89′ W. Marker is in Seven
Howard Tunnel Protected Marker image. Click for full size.
Photographed by Mike McKeown, January 11, 2026
2. Howard Tunnel Protected Marker
Valleys, Pennsylvania, in York County. It is on Glatfelters Station Road 0.1 miles south of Ranch Road, on the right when traveling south. In the Glatfelter Station Railtrail Parking Lot. Touch for map. Marker is at or near this postal address: 6584 Glatfelters Station Rd, Seven Valleys PA 17360, United States of America. Touch for directions.

Regionally, this marker is in South-Central Pennsylvania, specifically in Pennsylvania Dutch Country, in the Susquehanna Valley, and in Greater Harrisburg. It is also in the American Northeast and in the Mid-Atlantic. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once the Haudenosaunee (Iroquois) Confederacy and also one of the original Thirteen Colonies.

Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies: Glatfelter Station (within shouting distance of this marker); Birthplace of Commercial Ice Cream Production (approx. 1.8 miles away); Jacobus (approx. 2.1 miles away); The Road of Remembrance Veterans Memorial (approx. 2.2 miles
Map of County Rail Trail in Parking Lot image. Click for full size.
Photographed by Mike McKeown, January 11, 2026
3. Map of County Rail Trail in Parking Lot
away); St. Paul's (Ziegler's) Lutheran Church (approx. 2.2 miles away); Family Album (approx. 2.4 miles away); Making Lakes (approx. 2.4 miles away); The Keystone Grist Mill (approx. 2½ miles away). Touch for a list and map of all markers in Seven Valleys.
 
Also see . . .
1. More York County sites marked on self-led Civil War Trails tour (York Dispatch). (Submitted on January 11, 2026, by Mike McKeown of Baltimore, Maryland.)
2. Pennsylvania Militia Troops of 1863. (Submitted on January 11, 2026, by Mike McKeown of Baltimore, Maryland.)
 
 
Credits. This page was last revised on January 12, 2026. It was originally submitted on January 11, 2026, by Mike McKeown of Baltimore, Maryland. This page has been viewed 67 times since then. Photos:   1, 2, 3. submitted on January 11, 2026, by Mike McKeown of Baltimore, Maryland. • Bernard Fisher was the editor who published this page.
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Jul. 11, 2026