Establishment of nature reserve Sengsengebirge.
End of plans for Breitenau/Molln pumped storage power plant.

Various utilization plans in the Reichraminger Hintergebirge - pumped storage power plant in the Mollner Breitenau, cannon shooting range of the VÖEST, power plant projects of the Ennskraftwerke - led to resistance from various alpine and nature conservation associations and regional initiatives.

OUT for the planned cannon shooting range at Reichraminger Hintergebirge.

In February 1983, 35 nature and environmental associations form the "Hintergebirge Working Group" to prevent the planned construction of the power plant.

First national park plans for the Reichraminger Hintergebirge.

Occupations in the Hintergebirge, protests by NGOs, negative nature conservation report,
Ennskraftwerke officially withdraws the power plant project.

In September 1989, the Upper Austrian alpine and nature conservation associations issued the "Mollner Declaration", which called for the creation of a national park based on the international model in the area of Reichraminger Hintergebirge, Sengsengebirge, Haller Mauern, Warscheneckstock and Totes Gebirge.
Shortly afterwards, two unanimous government resolutions by the Upper Austrian provincial government and general approval by the political parties laid the foundation for the realization of this project. The foundation stone for the realization of this project was laid shortly afterwards by two unanimous government resolutions of the Upper Austrian provincial government and the general approval of the political parties.

On April 2, 1990 , the planning office for the Kalkalpen National Park as a branch of the Agricultural and Forestry Law Department of the Office of the Upper Austrian Provincial Government in Kirchdorf a. d. Krems officially began its preparatory and planning work. Provincial Government in Kirchdorf a. d. Krems officially began the preparatory and planning work. In May 1990, the "Association Kalkalpen National Park" was founded with the aim of "creating, preserving and promoting the Kalkalpen National Park" with international recognition from the IUCN.

Subsequently, farmers and landowners founded an "interest group planning area Kalkalpen National Park", which demands full information about the planning work, compensation for property-related disadvantages and the right to have a say.  

The first delimitation proposal for the core zone of the national park covered an area of 10,600 ha in barely cultivated high altitudes and was soon the target of criticism from nature conservation organizations and scientists from various disciplines.
In1993, the national park planning department proposed a core zone of 21,400 ha in a planning concept, taking into account natural conditions and the achievement of the following goals:

• Protection of the natural dynamics of forest communities in the area from the low montane zone to the forest boundary
• Protection of entire stream systems that is as comprehensive as possible
• Protection of alpine habitats and their fauna and flora

The system of "contractual nature conservation" was developed in cooperation with the interest groups Schutzgemeinschaft and the province of Upper Austria. This was the decisive breakthrough in negotiations with landowners and rights holders.

On December 5, 1996 , the O.ö. Landtag unanimously passed the O.ö. National Park Act was passed unanimously. With the ordinances of the O.ö. The national park was initially established on a total area of 16,509 ha with the ordinances of the Upper Austrian provincial government of July 21, 1997.

In April 1997 , the federal government and the province of Upper Austria jointly founded the Nationalpark O.ö. Kalkalpen Gesellschaft as the operator of the national park. Further negotiations with the landowners, information and public relations work as well as effective protection of the national park area and initial provision of infrastructural facilities are among the main tasks of the company.

July 21: Regulation of the national park area by the O.ö. provincial government to initially 16,509 hectares.

July 25: Official opening of Kalkalpen National Park in Windischgarsten

Internationally recognized by the IUCN, category II.

Nomination of Kalkalpen National Park as a Natura 2000 site in accordance with the Habitats Directive and the Birds Directive.

Expansion of Kalkalpen National Park to 18,400 hectares.

April 28: Opening Nationalpark Zentrum Molln.

Expansion of Kalkalpen National Park to 20,850 hectares.

June 20: Opening of the National Park Hotel Villa Sonnwend.

Designation as a European nature reserve (Natura 2000).

February 2: Declaration as a wetland of international importance (Ramsar Convention).

February 26: Foundation of the Nationalpark O.ö. Kalkalpen Service GmbH.

June 11: Opening of the National Park Wurbauerkogel Panorama Tower.

June 25: Opening of the Ennstal National Park Visitor Center.

June 16: 10 years of Kalkalpen National Park - anniversary celebration in Windischgarsten.

June 16: 16 municipalities sign the framework agreement Kalkalpen National Park Region.

August 9, 2009: Opening of the Hengstpasshütte information point.

Decision on the first Nationalparks Austria strategy paper.

June 9: Foundation of the Austrian National Parks Association.

"Netzwerk Naturwald" is being initiated across federal states to develop strategies for a biotope protection network.

April 30: Villa Sonnwend National Park Lodge reopens after renovation work.

Contract for pilot stepping stone area of the Styrian Provincial Forests, Natural Forest Network.

June 30: Production of the Universum film "Zurück zum primeval forest".

June 16: Expansion of the Kalkalpen National Park region to include Edlbach and Spital am Pyhrn - there are now a total of 18 Kalkalpen National Park regional municipalities.

Ancient beech forests and primeval beech forests in Kalkalpen National Park become Austria's first UNESCO World Natural Heritage Site.

Contract for two additional stepping stones on the territory of ÖBf, Netzwerk Naturwald.

February 7: The area "Nationalpark O.ö. Kalkalpen und Umgebung" is designated as a European nature reserve by decree of the O.ö. Austrian provincial government as a European nature reserve.

July 23: 20 years Kalkalpen National Park, anniversary celebration in Reichraming.

November 20: Opening of the joint tourism and national park information center in Windischgarsten.

Resolution on the Austrian National Park Strategy 2020+ to strengthen cooperation between the six Austrian national parks.

March: First corona lockdown in Austria: Closure of Villa Sonnwend and the national park visitor centers as well as WildnisCamp. All guided ranger tours are canceled.

February: Report of the State Court of Auditors on the own-initiative audit Kalkalpen National Park.

April 18: First "Austrian World Heritage Day" for all Austrian World Heritage Sites.

September 20: Presentation of Universum two-parter "Natural Heritage Austria - The National Parks" in Vienna.

July 9: 25 years of Kalkalpen National Park, anniversary celebration in Reichraming.

November 3: Villa Sonnwend National Park Lodge is once again named the best seminar hotel in Upper Austria.