A Royal Decree, no.119, issue 99kor, dated 2 October 2002 stated: Under the Ministry of Natural Resources and Environment, Royal Forest Department remains responsible for economic forestry work and a new Department of National Parks, Wildlife and Plant Conservation is further established, which is divided into 16 regions with 5 branches for the conservation, promotion and restoration of natural resources, wildlife and plant species in forest areas.
[2]: 5–6 Namtok Chat Sao Noi has the largest number of visitors with 389,000 (90%).
[2]: 7–13 Khao Laem Ya–Mu Ko Samet has the largest number of visitors with 1,620,000 (41%).
[2]: 23–28 Khao Sam Roi Yot national park has the largest number of visitors with 165,000 (44%).
[2]: 29–39 Khao Sok national park has the largest number of visitors with 419,000 (44%).
[2]: 60–62 Khao Pu–Khao Ya national park has the largest number of visitors with 167,000 (94%).
[2]: 63–67 Namtok Sai Khao national park has the largest number of visitors with 105,000 (38%).
[2]: 78–83 Khao Phra Wihan national park has the largest number of visitors with 203,000 (37%).
[2]: 84–90 Phu Langka national park has the largest number of visitors with 24,000 (41%).
In 1901, an agency called "Forest Region Phitsanulok" was established under the Royal Forest Department, Ministry of Interior, responsible for the following 7 provinces: Kamphaeng Phet, Phetchabun, Phichit, Phitsanulok, Sukhothai, Tak and Uttaradit.
"Office Forest Region Phitsanulok" was built near Chan Palace in 1924.
An improvement in 1940 divided the forests in Thailand into 11 regions, "Forest Region Phitsanulok" was responsible for 7 provinces: Kamphaeng Phet, Phetchabun, Phichit, Phitsanulok, Sukhothai, Tak and Uttaradit.
[1] A Royal Decree, no.119, issue 99kor, dated 2 October 2002 stated: Under the Ministry of Natural Resources and Environment, Royal Forest Department remains responsible for economic forestry work and a new Department of National Parks, Wildlife and Plant Conservation is further established, which is divided into 16 regions with 5 branches for the conservation, promotion and restoration of natural resources, wildlife and plant species in forest areas.
The name changed to "Protected Areas Regional Office 11 (Phitsanulok), PARO 11.
DNP regulation no.1241/2547 dated 27 July 2004, determined that management office 11 is responsible for 4 provinces: Nan, Phetchabun, Phitsanulok and Uttaradit.
DNP regulation no.1808/2547 dated 15 November 2004, restricted the main areas to 3 provinces: Phetchabun, Phitsanulok and Uttaradit.
[1] Since the Fine Arts Department has renovated the Chan Palace as a historical monument, PARO 11 (Phitsanulok) has to find a new place.
On 23 June 2013, the foundation stone was laid for the new building in Tha Thong subdistrict, Mueang district, Phitsanulok province.
Later on 25 January 2015 the Chan Palace area was abandoned and handed over to the Fine Arts Department.
In Somdet Phra Naresuan the Great Army Camp, 4th Infantry Division, was the temporary office.
[2]: 91–100 Phu Hin Rong Kla National Park has the largest number of visitors with 289,000 (58%).
[2]: 104–113 Si Nan National Park has the largest number of visitors with 115,000 (42%).
[2]: 120–127 Namtok Pha Charoen National Park has the largest number of visitors with 152,000 (50%).
[2]: 128–135 Phu Chi Fa National Park has the largest number of visitors with 290,000 (48%).