The Blacksmith Fork is a scenic river located in northern Utah, originating in the Wasatch-Cache National Forest east of Hyrum. It flows westward through Blacksmith Fork Canyon before joining the Logan River near Logan, Utah. The river is approximately 26 miles long and is a significant tributary in the Bear River watershed.

Paddling opportunities on the Blacksmith Fork are primarily concentrated in two main sections. The upper section, from Hardware Ranch to Hyrum City Power Plant, offers a 9-mile stretch of scenic canyon paddling. The lower section, known as the Highway 101 Section or Blacksmith Fork Canyon Run, provides a more challenging 5-mile stretch for experienced paddlers. The overall difficulty of the Blacksmith Fork ranges from Class II to IV, depending on the section and water levels. The upper section is generally milder, while the Highway 101 Section can reach Class III-IV during optimal conditions. Paddlers should have solid whitewater skills and be comfortable with remote canyon environments.

The Blacksmith Fork is primarily a spring runoff river, with the best paddling typically occurring from late April through early June. The Highway 101 Section is particularly flow-dependent, requiring 250-500 cfs and only running in high snowpack years.

The river corridor supports a diverse ecosystem, including cottonwood and willow trees along the banks, and provides habitat for trout, elk, and various bird species. The surrounding Blacksmith Fork Canyon offers stunning views of the Wasatch Mountains and is popular for hiking and camping. Key landmarks include Hardware Ranch Wildlife Management Area, a winter feeding ground for elk, and the Hyrum City Power Plant.

The main access points are at Hardware Ranch (put-in) and near the Hyrum City Power Plant (take-out), both accessible via Highway 101 east of Hyrum.

Historically, the Blacksmith Fork played a role in early Mormon settlement of Cache Valley, powering mills and supporting agriculture. Today, it remains important for irrigation and local recreation.

Paddlers should be aware of potential wood hazards, especially after high water events, and cold water temperatures in spring. Some sections may require specific permits or have seasonal closures to protect wildlife. While primarily used for day trips, the Blacksmith Fork area offers camping opportunities for those looking to extend their stay, including designated sites in the Hardware Ranch Wildlife Management Area and dispersed camping in Blacksmith Fork Canyon.