Driving a motor vehicle in the national park's territory is only allowed on roads designated for them.
Letting pets run free.
Taking or damaging trees, shrubs or other plants, or their parts, or mushrooms other than edible ones.
Damaging soil or rock, and extracting earth material or minerals.
Killing, catching or disturbing wild vertebrates, or destroying their nests.
Staying overnight in a campervan or caravan in the national park's territory.
You are not allowed to use your own boat or canoe on these ponds: Huosilampi, Keihäslampi, Pieni-Hossalaislampi, Iso-Hossalaislampi, Kirkasvetinen and Umpi-Valkeainen.
Equipment and Safety
Always take clothing and gear to suit the weather. In Hossa, the mobile phone coverage is fairly good, but there may also be dead zones.
Lighting a campfire is allowed at campfire sites if a forest fire warning is not in effect. You may use a portable camping stove on the terrain, as well.
The waters in Hossa are very clean, but not all of them have been studied. You can get drinking water from the visitor centre. A safe way to clean the drinking water is to boil it for a few minutes, during which any microbes will die.
The mosquito season is at its worst from mid-June to August. The amount of mosquitoes varies a great deal each year.
The period of autumn colours begins in early September and lasts, varying each year, to the end of September or to October.
The snowy season starts in November‒December and usually continues to early May.
Mobile Phone Coverage
Even though Finland has a good mobile phone coverage, there may be dead zones in the national park. Always contact your own operator to check network coverage. In addition, there are always spots where mobile phones do not work or there is interference. If this happens, try climbing to a higher place or going to an open area. You can also try to remove the phone's SIM card for the duration of an emergency call. You should also remember that the coverage is different in different mobile phones.
In Hossa, the mobile phone coverage is fairly good, but there may also be dead zones due to landforms.
Keep your mobile warm. Take food and drinks with you. Some phone models do not function in sub-zero temperatures, so it is worthwhile reporting your route plan and schedule to someone. In order to avoid your mobile battery running dead, take a spare power supply, a spare battery or an old mobile with a working battery with you.