East Longitudinal Valley

East Longitudinal Valley National Scenic Area is one of Taiwan's most distinctive and ecologically rich protected landscapes, encompassing the broad valley formed between the Central Mountain Range and the Coastal Mountain Range in Hualien and Taitung counties. The Longitudinal Valley, known as Huadong Valley, is a tectonic rift valley running approximately 180 kilometres (112 miles) along the island's eastern interior, where the Philippine Sea Plate meets the Eurasian Plate. The scenic area designation by Taiwan's Tourism Administration protects a landscape of paddy fields, river terraces, indigenous villages, and dramatic mountain backdrops that together create one of Taiwan's most celebrated cultural and natural landscapes. The valley floor is intensively cultivated, producing rice, fruits, and vegetables, with the agricultural patchwork set against towering mountain walls on either side.

The Longitudinal Valley supports diverse wildlife shaped by its position as a corridor between the Central Mountain Range's highland forests and the lowland coastal zone. The valley is particularly important for birds, with the Hualien-Taitung flyway through the Longitudinal Valley designated as one of Taiwan's premier birdwatching routes. Black-faced spoonbills, a globally endangered waterbird, and other migratory waders and waterfowl use the valley's wetlands and paddy fields during migration. Pheasant-tailed jacanas, a striking aquatic bird, inhabit the lotus ponds and shallow wetlands. The Raluan River and its tributaries support freshwater fish communities, while forested hillsides shelter many of Taiwan's endemic bird species. The valley's agricultural landscape, particularly traditional paddy farming, creates important habitat for wading birds and amphibians.

Vegetation in the scenic area reflects the transition from lowland subtropical forests to the agricultural landscape of the valley floor. Betel palm plantations, fruit orchards, and rice paddies dominate the cultivated areas, creating an agricultural mosaic characteristic of Taiwan's eastern valleys. Riparian vegetation along the Xiuguluan and other rivers includes native willows, bamboo, and subtropical trees adapted to periodic flooding. Forest remnants on valley slopes and hillsides support native subtropical broadleaf forest species typical of eastern Taiwan. Lotus cultivation in the valley's wetland areas not only produces flowers and seeds for market but also creates important aquatic habitat. Indigenous cultural landscapes, including areas managed by Amis communities, integrate traditional agroforestry practices that support native plant diversity alongside food production.

The Longitudinal Valley occupies a major tectonic suture zone where the Philippine Sea Plate has collided with and is subducting beneath the Eurasian Plate, making the area one of the most seismically active in Taiwan. The valley floor is underlain by unconsolidated alluvial and colluvial sediments deposited by rivers draining both the Central Mountain Range to the west and the Coastal Mountain Range to the east. The contrast in geology between the two flanking ranges is striking: the Central Mountain Range consists of ancient metamorphic and schist rocks, while the Coastal Mountain Range comprises volcanic and ophiolitic formations from the Philippine Sea Plate. Earthquakes are frequent and can be severe, with the valley recording some of Taiwan's largest historical seismic events. Active faulting continues to shape the landscape through uplift, subsidence, and lateral displacement.

The East Longitudinal Valley experiences a subtropical climate moderated by its valley position sheltered from the full Pacific exposure of the East Coast. Annual rainfall is substantial, typically ranging from 1,500 to 2,500 millimetres (59 to 98 inches) depending on location within the valley. The northeasterly winter monsoon brings significant precipitation to the northern valley, while the southern portion is drier and sunnier. Summers are warm to hot, with temperatures regularly reaching 32 to 35 degrees Celsius (90 to 95 degrees Fahrenheit) in July and August. Typhoons are a significant seasonal hazard from June through October, with the valley occasionally receiving direct impacts that bring extreme rainfall and wind. The sheltered valley position generally reduces wind exposure compared to the exposed East Coast, making it slightly more hospitable for agriculture.

The Longitudinal Valley has been inhabited by Amis, Bunun, Puyuma, Truku, and other indigenous Austronesian peoples for thousands of years, with communities developing sophisticated agricultural and social systems adapted to the valley environment. The Amis are particularly associated with the valley's rice and millet cultivation traditions, with elaborate ceremonies marking the agricultural calendar. Chinese Han settlement of the Longitudinal Valley began primarily in the nineteenth century, accelerating under Japanese colonial administration after 1895 when infrastructure development and agricultural expansion transformed the valley. The Japanese colonial period introduced systematic rice cultivation, road and railway construction, and administrative reorganisation that reshaped the valley landscape. Post-war development continued to transform land use, though indigenous communities have maintained significant cultural presence throughout the valley.

East Longitudinal Valley was designated a national scenic area to protect and promote the distinctive integrated natural and cultural landscape of the Hualien-Taitung valley corridor. Designation recognised that the valley's value lies not just in its natural scenery but in the combination of dramatic mountain landscapes, traditional agriculture, and indigenous cultural heritage that together create a unique landscape character. Management has focused on supporting sustainable tourism that benefits local communities, including indigenous villages, while protecting the natural environment and cultural heritage of the valley. Cycling infrastructure development has been a significant investment, with the Longitudinal Valley Cycling Route becoming one of Taiwan's most celebrated cycling experiences. Governance challenges include balancing development pressure with landscape character conservation.

The Longitudinal Valley Cycling Route is arguably the scenic area's most celebrated attraction, offering a multi-day cycling experience through paddy fields, indigenous villages, and dramatic mountain scenery. The route is designed to pass through or near communities where visitors can experience traditional Amis culture, local food production, and indigenous crafts. Xiuguluan River rafting is a major recreational attraction in the northern valley, with the river descending from the Central Mountain Range through scenic gorges. Fuyuan National Forest Recreation Area and other forested hillside sites offer hiking with valley panoramas. The paddy field art installations at Fuyuan, featuring giant rice straw sculptures and colourful rice variety plantings, are a popular seasonal attraction. Hot spring facilities near Ruisui and other locations provide relaxation amid the scenic mountain setting.

The scenic area is well-served by the South Link Railway, with stations at major towns including Hualien, Ruisui, Yuli, Guanshan, and Taitung providing convenient access points along the valley. The cycling route infrastructure includes bicycle rental shops, accommodation suited to cyclists, and baggage transport services that enable self-supported multi-day touring. Accommodation ranges from large hotels in Hualien and Taitung to smaller guesthouses and indigenous homestays in valley communities. Tour packages combining cycling, rafting, hot springs, and cultural experiences are available through local operators. The scenic area is accessible year-round, with spring and autumn generally offering the most pleasant cycling conditions. The paddy planting and harvest seasons add particular visual interest during specific months.

Conservation in the scenic area focuses on maintaining the landscape character that makes the valley distinctive, balancing agricultural land use, indigenous cultural heritage, and natural ecosystem values. Water quality management in the valley's rivers and irrigation systems is essential for the paddy farming that defines much of the cultural landscape. Sustainable agriculture practices, including organic rice cultivation and reduction of agrochemical use, are supported through certification schemes that link conservation with premium market access for farmers. Earthquake and flood risk management are significant concerns given the valley's tectonic setting, with infrastructure design and land use planning needing to account for these hazards. Indigenous cultural conservation, including language revitalisation and traditional practice support, is integrated with the scenic area's management as an inseparable element of the valley's heritage.