The Gregg River is a short river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in west-central Alberta

Alberta

Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...

. The river is named after Mr. John James Gregg (1840-1941). John Gregg was a prospector

Prospecting

Prospecting is the physical search for minerals, fossils, precious metals or mineral specimens, and is also known as fossicking.Prospecting is a small-scale form of mineral exploration which is an organised, large scale effort undertaken by mineral resource companies to find commercially viable ore...

 and trapper prominent in the area.

Course

The Gregg river forms at the confluence of a number of minor creeks near the Cardinal River Coal Mine, at the base of Mount Sir Harold Mitchell. The river then flows north-west, taking on a number of tributary creeks before joining the McLeod River

McLeod River

Mcleod River is a significant river in west-central Alberta, Canada. It forms in the foothills of the Canadian Rockies, and is a major tributary of the Athabasca River.-Course:...

, which in turn flows into the Athabasca River

Athabasca River

The Athabasca River originates from the Columbia Glacier of the Columbia Icefield in Jasper National Park in Alberta, Canada...

. The Gregg is bridged by Alberta Highway 40.

Tributaries

• Berry's Creek
• Sphinx Creek
• Drinnan Creek
• Warden Creek
• Teepee Creek
• Wigwam Creek