Big Horn Mammoth Run Half Marathon

Saturday, June 6, 2015 • Worland, WY • Course Map

Adding the half marathon distance for the first time a couple years back, Worland’s Big Horn Mammoth Run takes runners on a point-to-point course within the region of northern Wyoming known as the Big Horn Basin.

Located along the Big Horn River, bordered by the Big Horn Mountains to the east, the Absaroka Mountains to the west, and the Wind River Mountains to the south, this tiny town of just over 5,000 residents welcomes runners to join them as they provide an event sanctioned by USA Track & Field.

The race takes runners between nearby McNutt and the small town of Worland, where runners will board shuttle buses that leave from the finish line area at Worland High School’s Warrior Stadium to be dropped off at the starting line located midway down Lane 17 1/2.

A very small descent in the first mile will have runners started off with a nice first split. As they make their way onto South Flat Road, runners will note a steady ascent in elevation, and the first aid station around mile 3 marks the biggest climb in the entire race. Runners will hit the race’s peak elevation around mile 3.5 and enjoy gently rolling hills for the remainder of the course.

The race continues heading north along South Flat Road and runners will have a chance to hydrate around mile marker 6. Staying on the same road, but veering east, the course hits its lowest point in elevation around the halfway mark; after they pass mile 8, runners will keep heading north, passing by Worland’s airport in the process.

At just past mile 10, racers make a right onto County Lane 13 and travel for approximately a mile before turning left onto Country Road 11. The final stop for water lies at the mile 12 marker, where runners make a left turn onto County Lane 12. The last mile is a straight shot towards Warrior Stadium, where runners will cross the finish line on the track.

Race Weather & Climate

Located in between mountain ranges, Worland can experience warm temperatures in June, with highs in the low 80s and lows in the 50s. Runners can expect cooler temperatures in the morning during the actual race.

On race day (June 6), the average low is 48ºF and the average high is 78ºF.

Course Map

See the race route map for the Big Horn Mammoth Run Half Marathon here.


See race website


To reserve your spot in any of the race distances at the 2015 running of Worland’s Big Horn Mammoth Run/Walk, visit the event website here.

Official Race Website


Ever run in the Big Horn Mammoth Run/Walk? Share your impressions here, or post your review in the Comments below.

See more races in: June, Wyoming

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