Hpk, Finnish: Haapamäen rautatieasema) is a junction station in the village of Haapamäki, in Keuruu, Finland.

The number of trains heading for Ostrobothnia via Haapamäki dropped off in 1971 when the line from Tampere to Seinäjoki via Parkano was built.

No wholesale trade ever developed as all the merchants focussed their efforts on retail sales, which proved not to be very profitable in such a small village.

In that sense, Haapamäki was geographically in a favorable place for wholesaling as it would have been easy to competitively ship goods to Virrat and Ruovesi in the west and Jyväskylä in the east.

As Haapamäki became a junction station, the yard was expanded and a locomotive depot and water tower were built.

Russia's Ministry of War felt that this line was strategically important and demanded action to be quickly taken to get it built.

The central storehouse for wood used as fuel for the steam locomotives was located in Haapamäki; this provided work for many locals.

The livelihood of the State Railways staff was stable, which encouraged an ever increasing number of professionals in other sectors to move to Haapamäki.

Due to increased traffic, additional tracks were built on the west side of the railway yard.

Thanks to the Pori line, it was possible for trains to head in four different directions from Haapamäki, which was rare in Finland at that point in time.

The Finnish State Railway had a four-story brick building built near the station with 24 apartments for railroad workers.

The Finnish Defence Forces and Members of Parliament from Central Finland stood behind the project because they felt that it was important and it would shorten the trip south of the Haapamäki-Jyväskylä line by 100 km, which would also make it possible to reach Tampere via Haapamäki without having to go through Jyväskylä first.

When the railway yard was expanded to accommodate the line to Pori in 1937, the park was razed and the old station building dismantled.

The new two-storey restaurant building had a dining area and a kitchen downstairs and staff rooms upstairs.

Also, schedules were tightened in order to remain competitive with car travel, allowing less time for a relaxed meal.

In addition, the restaurant being open at night due to train traffic meant that the great majority of customers were drinking alcohol, which, in turn, made the experience less enjoyable and finally ended up being the reason for the restaurant closing down[citation needed].