- 1848: Began grading 17 miles from Beloit to Magnolia, Wisconsin by the Beloit and Madison Railroad
- 1860: 17 miles completed from Beloit to Magnolia, Wisconsin by the Beloit and Madison Railroad
- 1870: 29 miles completed from Winona Junction, Wisconsin to Winona, Minnesota by the La Crosse, Trempealeau and Prescott Railroad
- 1870: 129 miles started from Madison to Winona Junction, Wisconsin by the Baraboo Air Line Railroad
- 1871: Chicago & North Western Railway acquires the Baraboo Air Line Railroad
- 1873: 129 miles completed from Madison to Winona Junction, Wisconsin by the Chicago & North Western Railway
- 1874: Chicago & North Western Railway acquires the Beloit and Madison Railroad
- 1877: Chicago & North Western Railway acquires the La Crosse, Trempeleau and Prescott Railroad
- 1886: 4 miles completed from Meadery to La Crosse, Wisconsin by the Chicago & North Western Railway
- 1896-99: Segment between Evansville and Elroy double tracked and improved
- 1953-56: Double track mostly removed
- 1964: 33 miles abandoned from Elroy to Sparta, Wisconsin and purchased by Wisconsin DNR for future trail use
- 1965: First rail-trail in the United States opens between Elroy and Sparta
- 1976: Sparta to Winona and Meadery to La Crosse segments abandoned. Wisconsin DNR acquires land for trail use
- 1977: Beloit to Evansville segment abandoned
- 1979: Winona to Trempeleau segment acquired by Wisconsin DNR
- 1985: Reedsburg to Elroy segment abandoned and acquired by Wisconsin DNR
- 1980s: Onalaska to Trempeleau segment opens as Great River State Trail
- 1980s: Onalaska to Sparta segment and La Crosse Branch open as La Crosse River River State Trail
- 1993: 400 State Trail opens between Reedsburg and Elroy
- 1995: Chicago & North Western purchased by Union Pacific Railroad
- 1996: Union Pacific leases the Fitchburg-Reedsburg segment to the Wisconsin & Southern Railroad
- 1999: Fitchburg-Evansville segment abandoned, sold to City of Fitchburg and City of Oregon
- 2014: State of Wisconsin purchases the Madison-Reedsburg line from Union Pacific Railroad
- 2014: Wisconsin & Southern Railroad begins operations from Fitchburg to Oregon
- 1996-Present: Wisconsin & Southern Railroad operates the Madison-Reedsburg line
- 2014-Present: Wisconsin & Southern Railroad operates the Fitchburg-Evansville line, although it is still out of service
06/26/21
One of the features of the Elroy-Sparta trail are the three tunnels, as the trail winds through the bluffs of Monroe County.
This structure goes underneath a large ridge and WI-71.
This tunnel, is tied for shortest with Tunnel #1. It is listed at a length of 1,694 Feet total.
This tunnel is slightly harder to access, and requires a walk. It was built in 1873 at a cost of $75,557; or $44 per foot.
This made it the cheapest to construct. In addition, a rock liner was added in 1878.
The tunnel is an important attraction along the trail, although it is not the most popular.
The tunnel is a straight, bored tunnel. The interior was refurbished in 1878, and included a brick and masonry liner.
Both portals are traditionally built portals, resembling an arch structure. The interior has small indents, for safety when the tunnel carried trains.
Similar to the other tunnels, this one has doors that are typically closed between November and March.
The author has ranked this tunnel as being moderately significant, due to the lack of numerous tunnels in the area.
The photo above is looking at the west portal.