Hartz Creek is a tributary of the Tahltan River, part of the Stikine River watershed in northwest part of the province of British Columbia, Canada.

Hartz Creek's watershed covers 39.1 km2 (15.1 sq mi),[6] and its mean annual discharge is estimated at 0.315 m3/s (11.1 cu ft/s).

[6] The mouth of Hartz Creek is located about 18 km (11 mi) northeast of Telegraph Creek, British Columbia, about 73 km (45 mi) southwest of Dease Lake, British Columbia, and about 200 km (120 mi) east of Juneau, Alaska.

Hartz Creek's watershed's land cover is classified as 44.2% shrubland, 30.7% mixed forest, 20.8% conifer forest, and small amounts of other cover.

[8][9] Hartz Creek originates on the southeast edge of the massive Level Mountain shield volcano, about 45 km (28 mi) southeast of Meszah Peak, the highest peak of the Level Mountain Range, a cluster of bare peaks on the summit of Level Mountain.