ABSTRACT:

The Bolt Creek Fire started on September 10, 2022 and has burned ~14,600 acres of steep forested land within the North Cascade Range in northwestern Washington State (confluence of the Beckler and South Fork Skykomish rivers). Nearly 90% of the burned area has local slopes greater than 15 degrees, which is an approximate lower limit for saturated landslide initiation in cohesion-less soils. Most of the steep upland slopes (generally >30 degrees) and moderately steep mid-slopes (15 - 30 degrees) bear high and moderate soil burn severity levels. Several landslides were reported in the region in the winter of 2025. This resource publishes raw airborne LiDAR point clouds from surveys conducted in 2022, 2024, and 2025, and digital surface models (DSM) and bare earth DTMs obtained from airborne LiDAR. The resource are organized in folders that contain the original (raw) point cloud, filtered point cloud products, spatial boundaries, and multiple raster surfaces derived from the Lidar, including digital surface models (DSM), digital terrain models (DTM), a USGS reference DEM used for coregistration, and a DEM difference product for each LiDAR survey block. These include a composite data for a large downstream portion of Eagle Creek, two post landslide surveys, and a clearcut region where fire first started. The data provide evidence for post-fire geomorphic response in the cool and wet western slopes of the Cascades.