Start: N 59°17.155' E 016°28.877'. Ingen parkering.
Skärmskydd: Kvarntorp - N 59° 13.905' E 16° 23.311'
Vatten: Källa vid Kvarntorp - N 59°14.013' E 016°23.706'
The section is easy hiking and starts out on a gravel road. Towards the east of the path is a graveyard from the early Iron Age with 94 mounds and a so-called raised stone. Arriving at the village Årby is a limestone quarry that was in use in the 1800s. Here we see the remains of a raised furnace.
The route down to the lake Lilla Bälgvikssjön passes through coniferous forest and over some hills. 2 km behind the lake crosses the road between Eskilstuna and Hälleforsnäs. At the east shore of Lilla Bälgvikssjön is a great bathing spot. It's then about 1 km to an abandoned train station, followed by another 600 metres on gravel road where the lake Näshultasjön can be seen on the left. The path continues on an old road past the grounds of the croft Gustavsberg and its former agricultural land that now is grown over with firs.
The path then goes to Smalsundet, a channel dug out by hand in 1894, joining the lakes Bälgvikssjön and Näshultasjön. The path passes Lillsundet with beautiful birch pastures and good pitches for tents. After Lillsundet one has an excellent view over the lake Näshultasjön. Just before Kvarntorp the trail passes an old charcoal kiln. The path continues through an area rich on hazel, aspen, oak, birch and alder.
At the section end Kvarntorp are toilets, a wind shelter, good pitches for tents, a spring and the possibility to swim in the lake. At Kvarntorp there is also a small nature reserve.