4.0
(1)
10
riders
4
rides
Mountain bike trails in Stora Alsjön traverse a landscape characterized by hilly, forested terrain and old-growth coniferous forests, some hundreds of years old. The area features numerous nutrient-poor lakes, including Stora Alsjön itself, and offers varied ground with rock outcrops and evidence of past forest fires. While primarily known for hiking, the rugged and mixed terrain provides opportunities for mountain biking on designated paths. This natural reserve in Södertälje Municipality presents a challenging environment for mountain bikers seeking varied routes.
…Last updated: May 7, 2026
3
riders
35.7km
02:35
230m
230m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
1
riders
19.8km
01:20
110m
110m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Sign up for free
2
riders
42.7km
03:09
310m
310m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
2
riders
16.4km
01:02
130m
130m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
4.0
(1)
2
riders
24.4km
01:43
180m
180m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Start today with a free account
Your next adventure awaits.
Login or Signup
A compact but varied reserve just west of Nykvarn, Jägarskogen offers quiet forest walking on a short loop of about 3.5 km. The terrain shifts between old pine and spruce stands, rocky knolls and small wetland pockets, giving the area a surprisingly wild feel for its size.
0
0
pay attention, difficult stage 3/4 on the left long arm of the lake. very small trail and high clip! about 800m to drive
0
0
This road crosses the Vackstaskogen nature reserve, located next to Vackstaviken bay, by Lake Långsjön in Södertälje municipality.
0
0
Vidbynäs Kyrka sits enthroned on a hill. There is a golf course nearby and Vidbynäs Kök & Bar invites you to brunch.
0
0
The parking lot is small (maximum 6 cars can park here) The information board helps to locate the fire spots and where camping is allowed in the nature reserve
0
0
The bridge is small but strong. It takes you across this swamp very well.
0
0
The trails in Stora Alsjön traverse a diverse landscape characterized by hilly, forested terrain. You'll encounter expansive, relatively untouched coniferous forests, some hundreds of years old, with varied ground including damp valleys, dry bedrock areas, and rock outcrops. Traces of past forest fires are also visible in some areas, contributing to a unique environment.
Yes, Stora Alsjön offers trails suitable for beginners. For an easier ride, consider the Turinge Church loop from Nykvarn. This 12.3-mile (19.8 km) route is rated as easy and leads through a mix of open and wooded landscapes, typically completed in about 1 hour 19 minutes.
There are 4 mountain bike trails available in Stora Alsjön, offering a range of difficulties from easy to difficult.
Yes, experienced riders looking for a challenge can tackle the Jägarskogen Nature Reserve – Lake Yngern loop from Rimsjohöjden. This difficult 24.3-mile (39.1 km) trail features significant elevation gain through varied forest terrain, taking approximately 2 hours 50 minutes to complete.
The trails often pass by several oligotrophic lakes, including Stora Alsjön, Lilla Alsjön, and Trönsjön. You can also experience old-growth forests with ancient trees and bogs, contributing to a strong sense of wilderness. From Alsjöklint, a high mountain in the heart of the reserve, visitors can enjoy expansive views over the forest landscape.
While the Sörmlandsleden trail, which traverses parts of the area, can be demanding, there is a specific mountain biking trail known as Stora Alsjön - Trönsjön. This trail is described as a "Dirt/Gravel Road" with an "Easy" physical rating, making it suitable for families or those preferring less technical mountain biking. It's also a good option if you prefer not to carry your bike on more challenging sections of the Sörmlandsleden.
Yes, dogs are allowed on the trails in Stora Alsjön, including the Stora Alsjön - Trönsjön trail. Please ensure your dog is kept under control and follow any local regulations regarding pets in nature reserves.
Yes, many of the routes in Stora Alsjön are designed as loops. Examples include the Jägarskogen Nature Reserve – Lake Yngern loop from Rimsjohöjden, the Turinge Church loop from Nykvarn, and the Mountainbike loop from Stortäppan, allowing you to start and end at the same point.
The area is highly rated by the komoot community, with an average score of 4.0 stars. Mountain bikers often praise the varied terrain, the extensive forested areas, and the sense of wilderness offered by the old-growth forests and numerous lakes.
Yes, designated picnic areas with shelters and fire pits are available, particularly on a headland overlooking Lake Stora Alsjön and near Lilla Horssjön. Bringing your own firewood is recommended. The reserve also features a swimming area, making it an appealing spot during warmer months.
The best time to visit for mountain biking is generally during the warmer months, from spring to autumn, when trails are dry and accessible. The calm waters of the lakes also invite activities like swimming during this period. Always check local weather conditions before heading out.


Browse the best MTB trails in other regions.