Multnomah Falls, a 620-ft-tall waterfall in the Columbia River Gorge, is the most visited natural site in Oregon. Its economic value is unclear, however, as the Falls are free to access. Due to a wildfire in 2017, the site was partially closed for over a year. Costly repair work was carried out along the single trail that allows visitors to hike to the top of the waterfall. In this study, we first determined the overall economic value of this iconic site. Secondly, we broke down the economic value by the different trail segments at Multnomah Falls. Using the contingent valuation method, we estimated willingness-to-pay (WTP) for the Falls (n = 1190) and counted visitors using infrared sensors along the trail and parking lot count data from June to September 2019 to obtain economic benefits across the population. We found that visitors who travelled to the top of the Falls experienced greater WTP than ones who only travelled to the bottom, with mean WTP ranging from $8.24 - $9.66 per trip. The total annual benefit provided by Multnomah Falls is estimated to be at least $11.23 m, which considerably exceeds the cost of repairing the trails after the fire (approximately $3 m).

摩尔特诺玛瀑布（Multnomah Falls）是位于哥伦比亚河峡谷（Columbia River Gorge）的620英尺高的瀑布，是俄勒冈州访问量最大的自然景点。但是，由于瀑布可以自由进出，因此其经济价值尚不清楚。由于2017年的一场大火，该基地被部分关闭了一年多。沿着单步道进行了昂贵的维修工作，使游客可以爬到瀑布的顶部。在这项研究中，我们首先确定了该标志性网站的总体经济价值。其次，我们按照摩特诺玛瀑布的不同路线细分了经济价值。使用或有估值方法，我们估算了瀑布的支付意愿（WTP）（n = 1190），并使用红外传感器沿着步道和停车场的计数数据对游客进行了计数（从2019年6月至2019年9月），以在整个人群中获得经济利益。我们发现，到达瀑布顶的游客的WTP高于仅到达谷底的游客，平均WTP在$ 8.24-$ 9.66之间。Multnomah Falls提供的年度总收益估计至少为1,123万美元，大大超过火灾发生后维修小径的费用（约300万美元）。