Question: Haleakala Trail is now part of a national park covering how many acres?

Context articles: Glacier Bay Basin
Sembilang National Park
Haleakala Trail
Gunung Leuser National Park
Way Kambas National Park
Bicol Natural Park
Roosevelt Protected Landscape
Haleakalā National Park
Batang Gadis National Park
Wanstead Park

Glacier Bay Basin in southeastern Alaska, in the United States, encompasses the Glacier Bay and surrounding mountains and glaciers, which was first proclaimed a U.S. National Monument on February 25, 1925, and which was later, on December 2, 1980, enlarged and designated as the Glacier Bay National Park and Preserve under the Alaska National Interest Lands Conservation Act, covering an area of 3,283,000 acres (1,329,000 ha).
 In 1986, UNESCO declared an area of 57,000 acres (23,000 ha) within a World Biosphere Reserve.
 This is the largest UNESCO protected biosphere in the world.
 In 1992, UNESCO included this area as a part of a World Heritage site, extending over an area of 24,300,000-acre (98,000 km) which also included the Wrangell-St.
 Elias National Park, Kluane National Park (Canada) and Tatshenshini-Alsek Park (Canada).
 Part of the National Park is also designated a Wilderness area covering 2,658,000 acres (1,076,000 ha).
Sembilang National Park is a national park covering 2,051 km along the east coast of Sumatra, Indonesia.
 The park is dominated by swamps as peat forests, like the neighbouring Berbak National Park, and both parks are Ramsar wetlands of international importance.
 The park is considered to have the most complex shorebird community in the world, with 213 species recorded, and supports the world's largest breeding colony of milky storks. From Palembang to the Sembilang National Park needs one hour drive plus one and a half hour by boat and then one hour overland.
The Haleakalā Trail (also sometimes known as the "Haleakala Bridle Trail") is the historic public access route to Haleakalā Crater and the summit of Haleakalā, which are now part of Haleakalā National Park.
Gunung Leuser National Park is a national park covering 7,927 km in northern Sumatra, Indonesia, straddling the border of North Sumatra and Aceh provinces, a fourth portion and three-fourths portion, respectively.
 The national park, settled in the Barisan mountain range, is named after Mount Leuser (3,119 m), and protects a wide range of ecosystems.
 An orangutan sanctuary at Bukit Lawang is located within the park.
 Together with Bukit Barisan Selatan and Kerinci Seblat National Parks, it forms a World Heritage Site, the Tropical Rainforest Heritage of Sumatra.
Way Kambas National Park is a national park covering 1,300 square kilometres in Lampung province, southern Sumatra, Indonesia.
The Bicol Natural Park is a protected area of the Philippines located in the Bicol Region of southern Luzon.
 It straddles the mountainous border between the provinces of Camarines Norte and Camarines Sur in the northern interior of the Bicol Peninsula.
 First declared as a national park covering 4225 ha on 13 February 1934 through Proclamation No. 657 of Governor General Frank Murphy, the Bicol National Park was later extended to its present area of 5201 ha through amendments made in Proclamation No. 655 signed by President Manuel Luis Quezon on 23 December 1940.
 The area was reclassified as a natural park on 29 December 2000 by virtue of Proclamation No. 43 by President Joseph Estrada.
The Roosevelt Protected Landscape, also known as "Roosevelt Park", is a protected area in the Central Luzon region in the Philippines.
 It occupies an area of 786.04 ha of grasslands and old-growth forest in northern Bataan province near Olongapo and the Subic Bay Freeport Zone.
 The park was established as Roosevelt National Park covering an area of 1485 ha on 30 March 1933 through Proclamation No. 567 signed by Governor-General Theodore Roosevelt, Jr. In 1965, the national park was reduced to 1334 ha .
 On 23 April 2000, the park was reclassified as a protected landscape area and was further reduced to its present area of 786.04 ha .
Haleakalā National Park is a national park located on the island of Maui in the U.S. state of Hawaiʻ i.
 The park covers an area of 33,265 acre , of which 19,270 acre is a wilderness area.
Batang Gadis is a national park covering 1,080 km in North Sumatra province, Indonesia extending between 300 and 2,145 metres altitude.
 It is named after the Batang Gadis river that flows thorough the park.
 Signs of the endangered Sumatran tiger and the threatened Asian golden cat, leopard cat and clouded leopard were seen in the park.
 The protection of Batang Gadis as a national park is part of a plan to create the Northern Sumatra biodiversity conservation corridor, which would be connected, via a series of protected areas and forests, to Gunung Leuser National Park in the north of the island.
Wanstead Park is a municipal park covering an area of about 140 acres (57 hectares), located in Wanstead, in the London Borough of Redbridge, historically within the county of Essex.
 It is bordered to the north by the A12 road, to the east by the River Roding and A406 North Circular Road, to the south by the Aldersbrook Estate and the City of London Cemetery and Crematorium and to the west by Wanstead Golf Course.
 It is administered as part of Epping Forest by the City of London Corporation, having been purchased by the Corporation in 1880 from Henry Wellesley, 1st Earl Cowley.
 Today's park once formed part of the deer park of the former manor house of ancient Wanstead Manor, which included much of the urbanised area now known as Wanstead.
 The present park retains some of the layout of its former existence as Wanstead House's grounds, though the park's western boundary lies some 330 yards east of the house's site .
 In 1992 a Management Plan was initiated to try to re-establish something of the formality of the grounds of a "Great House".