From Rauma you will find hiking trails from the archipelago and main land as well.
The best hiking trails in Rauma can be found in the biggest islands in Rauma archipelago: Nurmes and Reksaari. The marked hiking routes can be explored either independently or with an instructor. Resting places along the trails have lean-to shelters (laavu), outhouses, campfire places and firewood. There are both easy and more challenging hiking trails in the archipelago. The simple cottages in the archipelago have been renovated by developing the structures of the old houses. The cottages can be booked in Service Point Pyyrman.
Main land there is trails like Latumajareitti and Omenapuumaa.
More information about hiking trails you will find from right side links. Some information is in Finnish.