Salix monticola, commonly known as Park Willow, is a deciduous tree or large shrub native to montane riparian zones, wetlands, and moist subalpine meadows in the Intermountain West of North America. It typically grows to 4–6 m (13–20 ft) in dense clumps, with a variable appearance influenced by environmental conditions. The branches are yellowish or reddish-brown, often mottled with green, and the lance-shaped to oval leaves can reach up to 9.5 cm (3.7 in) long, featuring smooth, wavy, or toothed margins. Park Willow is dioecious, with male and female flowers on separate plants, and the catkins are wind-pollinated. Seeds are short-lived but germinate rapidly when they land on moist substrates.

Park Willow is valued for its adaptability to wet conditions and is often used for streambank stabilization and habitat restoration projects. Its ability to thrive in full sun to part shade and in soils with fast drainage makes it suitable for naturalistic plantings. While it requires low amounts of water once established, it is important to provide adequate moisture during its establishment phase. Park Willow can be susceptible to willow scab and pests such as aphids, which may require management in a garden setting. It is not typically grown for ornamental purposes but can be an important ecological component in appropriate settings.CC BY-SA 4.0