No special access issues
Remember that the forest is shared with hikers, mountain bikers, trail runners etc. Be polite and considerate, clean up after yourself, and brush off tick marks before you leave.
Search for "Østmarka Idrettsbarnehage" or "Unnarennet 0687 Oslo" for where the approach begins.
🚗 Driving 🚗
Parking is limited, public transport recommended.
Parking 1 - approach from north: Public parking available near Hellerudsvingen 28, 0684 Oslo (59.899910, 10.851864). From Oslo city centre take Rv162, E6, Tvetenveien and Hellerudveien to Hellerudsvingen in Bydel Østensjø. Takes about 15 minutes.
Parking 2 - approach from west: Parking "Pumpehuset" available behind Unnarennet 1, 0687 Oslo, entry to parking lot through Hellerudveien (59.895750, 10.855416). A minute or two further along Hellerudveien with the instructions above.
🚌 Public transport 🚇
🚇 Metro/T-bane: Line 3-Mortensrud (Eastbound) to Oppsal station.
Option 1 - approach from north: From Oppsal, follow blue marked DNT-path towards Østmarka until you get to the parking lot by the edge of the forest. The walk takes about 15 minutes. About 35 minutes in total from city centre to approach start.
Option 2 - approach from west: From Oppsal station, follow Vetlandsveien up from the intersection. Take a right onto Helge Sollis vei, then the first to your left onto Kampheimveien. Follow Kampheimveien for 750 m until you get to Hellerudveien. Cross Hellerudveien and take a right, then the first left onto Unnarennet. Follow the the road until you see a statue of an elephant. Cross the green patch towards the woods. See map on 27crags for detailed route.
🚌 Bus: Bus 76-Mortensrud T or 79-Åsbråten to Solbergliveien stop if coming from Oslo central areas. Transfer from metro at Helsfyr or Hellerud station to the buses above. The bus stop is right next to the parking lot/approach start. Eftaåsen stop if closer for the approach from west.
🚶♀️ Approach 🚶♂️
Option 1 - approach from north: This approach takes you through parts of the Filmplaneten crag. Take the good gravel path towards the woods. For Speidersteinen and Kontorveggen; once you've walked past the boom barrier, take the gravel path leading to the right (southwards). Speidersteinen will be on your left behind some trees after about 450 m. Kontorveggen is a bit further down the gravel path, then onto unmarked trail. For Katteparken, Ubåtveggen and more, follow the gravel path straight ahead into the woods after the boom barrier. Follow the first, blue marked path to the right towards Skøyenputten/Østmarksetra. Skøyenputten pond will be on your left after a few mintues. At the far end of the pond, you are into Katteputten crag. Most boulders lay along north/south going lines that are easy to follow.
Option 2 - approach from west: You can quickly and easily follow trails to both Kontorveggen and Speidersteinen from this starting point. For Katteparken, Ubåtveggen etc you'll have to walk over a hill eastwards, and there are countless paths you can follow. Check the map for a suggested path.