Duplainville (CP/CN) – Pewaukee, Wisconsin, USA | Train Spotting Location

Duplainville is the rare place where two busy Class I railroads—Canadian Pacific Kansas City (CPKC, ex-CP) and Canadian National (CN, ex-WC)—still meet at a ground-level diamond, giving railfans a front-row seat to more than 40 trains per day, including long intermodal stacks, heavy mixed freights, ethanol drags, and Amtrak’s Chicago–Seattle/Portland Empire Builder. The unobstructed sightlines, variety of paint schemes, and constant rumble of steel on steel make this suburban Milwaukee junction one of the Midwest’s premier year-round trainwatching hotspots.

🛤️ The Trainspotting Experience

Most visitors set up near the public grade crossing on Duplainville Road, where the east-west CPKC Watertown Subdivision crosses the north-south CN Waukesha Subdivision at right angles. From the roadside ballast you are only a few car-lengths from the diamond; locomotives thunder by at track speed, horns echoing across the open fields. Trains occasionally crawl or stop as crews await clearance, giving ample time to study locomotives, foreign power consists, or distributed power units. Dispatchers coordinate meets so it is common to witness two trains pass or even “bang the diamond” within minutes of each other, a spectacle of noise and rail clatter unique to active junctions.

🌄 Landscape, Setting and Local Atmosphere

Duplainville sits on gently rolling glacial terrain just west of Pewaukee. Surrounding the tracks are low grassy embankments, scattered oaks, and pockets of wetlands that attract red-tailed hawks and sandhill cranes. Elevation is modest—just enough to let photographers climb a few feet for a broad view. Suburban housing is visible to the south, yet the area feels surprisingly rural, especially in early morning when ground fog hugs the ballast and the only sounds are distant birds and approaching horns. Summers are warm and humid, winters snowy and brisk; crisp autumn days deliver golden foliage that frames trains in classic Midwest hues.

🚂 Type and Frequency of Train Activity

• CPKC (Watertown Sub): Approximately 20–25 trains daily. Expect double-stack intermodals, grain, ethanol, potash, and general manifest freights. Amtrak’s Empire Builder (Trains 7 & 8) passes twice daily, usually mid-morning westbound and late afternoon eastbound.
• CN (Waukesha Sub): Roughly 15–20 trains daily. Traffic includes intermodal, crude oil, lumber, and unit trains of frac sand leaving Wisconsin mines. Locomotive lash-ups frequently feature CN, IC “Death Star,” BCOL, or leased power.
Typical train lengths vary from 70-car manifests to 12,000-foot intermodals employing mid-train or rear DPUs. Track speed on both routes is 50 mph for freights; Amtrak sprints through at up to 60 mph.

📸 Best Angles for Photos and What Railfans Enjoy Most

1. South-east quadrant: Morning light bathes eastbound CPKC freights broadside while CN trains approach head-on, producing dynamic crossing shots with minimal shadows.
2. North-west mound: A small rise near the utility box allows elevated three-quarter views of afternoon westbounds on CPKC against open sky.
3. Sunset silhouettes: Position west of the diamond along the farm fence line; golden-hour backlighting outlines stack cars and highlights kicked-up ballast dust.
   Long lenses (200–400 mm) capture crew faces and wheel sparks on the frog, whereas wide-angles (24–35 mm) emphasize converging rails and Wisconsin cloudscapes. Many railfans aim to photograph an Amtrak/CPKC meet with a CN freight, a combination that rewards patience and scanner monitoring.

🕰️ Historical or Cultural Relevance

The east-west line was built in the 1850s by the Milwaukee & Mississippi Railroad, later the Milwaukee Road, and absorbed by Canadian Pacific in 1985. The north-south corridor originated with the Wisconsin Central in 1885, became part of Soo Line, then spun off and reacquired by CN in 2001. A classic wooden interlocking tower guarded the crossing from 1897 until automation rendered it obsolete; it was demolished in 1987 but photographs of the tower still circulate among local historians. Duplainville has long served as a photographic benchmark for locomotive paint transitions—from Milwaukee Road orange to modern CPKC red, and from Wisconsin Central maroon to CN’s black-and-red “noodle.”

🧭 What Makes This Spot Different from Others

Few Midwest locations combine heavy traffic from two separate Class I carriers, an at-grade diamond, passenger service, and unrestricted public vantage points. Unlike urban junctions hemmed in by fences or buildings, Duplainville offers 360-degree visibility and the chance to watch trains accelerate after clearing the crossing. The mix of Canadian-based railroads adds diverse motive power not always seen on nearby Union Pacific or BNSF lines, making every visit a variety show of heritage units, foreign run-through power, and special extras like dead-in-tow locomotives bound for repair at CPKC’s Milwaukee shops.

📚 Additional Resources

Wisconsin Chapter NRHS
Canadian National Railway – Wisconsin Operations
CPKC Railfan Information Forum"