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1 photo from Wikimedia Commons · credits & licences
- 1. Union Pacific Snowed In, circa 1930s - Headquarters, Idaho (34016608882): Steve Shook from Moscow, Idaho, USA· CC BY 2.0
what is it?
The Union Pacific class MK-1 was a class of 2-8-2 'Mikado' type steam locomotives that were built by the Baldwin Locomotive Works originally for the Oregon Railroad and Navigation Company (OR&N), Oregon Short Line Railroad (OSL) and Union Pacific Railroad (UP) in 1910 and 1911.
base stats
Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.
fun facts
- First built 116 years ago, in 1910.
- Weighs about as much as 20 African elephants (~6 t each).
steam locomotive: Burns coal, wood or oil to boil water; the steam drives pistons that turn the wheels.
spec sheet
- built
- 1910–1911
- status
- preserved
- number built
- 86
- kind
- steam
- traction
- steam
- origin
- 🇺🇸 United States
- builders
- Baldwin Locomotive Works
- top speed
- —
- power
- —
- gauge
- 1,435 mm standard gauge
- wheel arrangement
- 2-8-2
- weight
- 119 t
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q130749086, Wikipedia: Union Pacific class MK-1 (CC BY-SA 4.0).Updated 2026-10-25.