Délin Chú — known in English as the Teslin River — is a major tributary of the Yukon River system, stretching approximately 393 miles (632 km) through northwestern British Columbia and southern Yukon, Canada. The name Délin Chú comes from the Northern Tutchone language and translates meaningfully as "water running out from the lake," a fitting description for a river that originates from Teslin Lake before flowing northwest to join the Yukon River. With a drainage basin of roughly 35,500 square kilometres (13,700 sq mi), this is a substantial wilderness waterway carrying deep cultural significance for the Indigenous peoples of the region, including the Inland Tlingit group known as the Deisleen Kwáan, or "Big Sinew Tribe," who have long relied on the river as a lifeline for fishing, travel, and seasonal gatherings. The river's powerful, flowing current and remote Yukon setting make it a compelling destination for anglers seeking a true northern wilderness fishing experience.