Lammi is one of the best mid-grade sport climbing areas in Southern Finland. Vertical or slightly overhanging rock with jugs and lists offer both pumpy and fingery classics. Grade varies between 6a to 7b, while most routes fall between 6b and 6c. The only downside of the crag is noise from the Lahti-Tampere motorway close by. Take care when crossing the road. Good communication between climbing partners is essential.
The recommended crag classics among many are 'Laudatur' 7a, 'Otepää' 6a+ and 'Listahitti' 6b+. Nummi is a good place to escape hot summer days and to tick some onsights. The crag faces north-east and gets little sun.
Wearing a helmet is advised, some holds can be loose especially during Spring. Rock is generally solid granite. The path to the top of the crag goes from left side. New routing is prohibited from the right side of 'Laudatur' due to environmental issues. Avoid moving in that area altogether.