Antelope Island 50k

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BUFFALO RUN ADVENTURES | Antelope Island Fall Classic 50k

Saturday November 11th, 2017

Start Time: 8:00 a.m.


Ok boys and girls, the Antelope Island Fall Classic 50K is now on. Let the party begin. The date for this year’s Antelope Island 50K is November 11th, 2017. A bit later this year, but it’ll give you a chance to get in one last ultra before shutting it down for the winter and hitting the slopes. There will not be a 100K this year.

Quick Synopsis

Distance – 50K, how far is that? 50K, oh, you mean in miles, it’s about 31 miles.
Vert – Yep, there is some. Oh, how much? Well, roughly 3500’ of gain.

Race Registration

Ultra Signup Logo

Registration is now open.  There will only be one way to register this year and that’s electronically.   Go to and look for the Antelope Island 50K. The cost for the 50K race is $73.47 through October 1st, then we raise the entry fee to $84.98. You’ll be able to register online until October 31st. There will be race day registration again this year. For day of race, the entry fee will be a nice round $90.00. Easier to make change that way. We’ll take cash (with ID) and checks. If you wait until race day, there is no guarantee of a race shirt or goodies in your goody bag.


Click here for refund policy.

Discount Codes

DUMBEST IDEA EVER! Just makes your running buddy mad that you got into this sweet race for less money then he/she did. I don’t do them and have no plans to have any. Just pay the entry fee if you want to run the race.

State Park Waiver

You need to sign the state park. We’ll have it at race checkin and you can sign it there.

Course Info

No course changes this year, same as last year. Basically the course goes like this. Start at White Rock Bay, just like the Buffalo Run. Go out and up the hillside, once you get to the switchback you go left. Then you keep running out to the Elephant Head aid station. This will be about 5.5 miles. Once past Elephant Head, you’ll go down Death Valley and up the switchbacks. At the top of the switchbacks you’ll go over the saddle and down into Red Rocks Canyon. There will be no course markings between the top of the switchbacks and the next aid station. Just follow the trail. There are no side trials to take and no one has ever gone off trail in this section. Continue to follow the old ranch road for the next few miles up the hillside. You gain about 1000’ along here. You’ll get to the north side of the Sentry trail. Guess what, there’ll be an aid station here. From here you’ll go behind Sentry peak, then down the dirt road to the ranch. We’ll have an aid station just north of the ranch at a place called 9-mile gate. From the ranch you’ll follow the Mountain View Trail north. You’ll also find an aid station at the Lower Frary parking lot. Once you get to the fence, you’ll bushwhack up along the fence to the paved road, then follow the dirt road next to the fence back to the start/finish area. Anyway, eventually you end up back at the race HQ and the finish line. Won’t that be fun! Here’s a link to the route.

Aid Stations

Some of the aid stations aren’t real close together, so you’ll need to plan accordingly Elephant Head – This is a full service aid station about 5.5 miles from the start. No drop bags here. It’s only 5.5 miles from the start, you don’t need a drop bag. Same place as for the Buffalo Run. North Sentry – Pretty much full service around 8 miles from Elephant Head. No drop bags here. Nine Mile Gate – Once again, full service. This one is about 6 miles from North Sentry. We’ll let you have a drop bag here. Lower Frary – Full service. Roughly 3 miles from Nine Mile Gate. No drop bags here but we may have a porta-john. Start/finish – Full service (obviously) about 6.6 miles from Lower Frary.

Time Limits

The time limit for the 50K will be 10 hours. That means you need to cross the finish line no later than 6pm.


We hand time the race.  Just make sure your bib is visible when you cross the finish line.

Drop Bags

There will be two drop bag locations, one at the start/finish (duh) and the other at the Nine Mile Gate aid station.  That’s it.  No Elephant head drop bags this year.


For this race I ask that you leave your dogs at home.  The reason is that you’ll be in the island backcountry and dogs are not allowed on the west side trail.  The park has asked that I not allow dogs for this race.  Thanks.


Reserve a campsite if you want to camp out. There will be camping at the start only for volunteers.

Some Rules

Here are a few of the rules. We’ll make up others as needed.

  1. NO TRASHING THE PARK. If you are observed purposely dropping litter of any kind (including the little gel tab thingies), you will be removed from the race. Period. We will have trash cans setup a ways outside each refreshment stop. Drop your cups and gel thingies in those or carry them with you. They aren’t that heavy. This ain’t no road race and we aren’t your Mother and don’t want to sweep the course to pick up your trash.
  2. Don’t cut the course. Of course that would be kind of difficult. Make sure your race number shows.
  3. If you’re going to bandit the race, then we won’t give you anything at the aid stations.  We might heckle you as well. Plus, you could get banned from future events.
  4. No pacers. Come on now, really. If you need a pacer for a measly 31 miles, well, we won’t go there. Of course you can hang with someone else running the race if you’d like.


Weather, hmmm, it has snowed on the race before when it was held in November, so be prepared. It could also be a pretty nice, but cool day, perfect for that PR.

Directions to Antelope Island

If you’re coming from either the north or south on I-15, take exit 332. This exit has a state park sign on the freeway. It’s also the Antelope Drive exit. Once at the traffic signal off the exit, go west on Antelope drive. This means turn left off the northbound exit and right off the southbound exit. Drive about 4-5 miles towards the Great Salt Lake (west). Just before the lake you will run out of houses, etc. and see the main gate on to the island causeway. Just prior to the main gate, there is a paved parking lot on the left. This is where you can check in Saturday morning if you didn’t on Friday. You will pick up your goody bag, etc. here. Your bib is your pass on to the island. There is no separate island pass this year. If you carpool with your friends and your family comes out later, they will have to pay the entrance fee to get on the island. Go across the causeway towards the island, enjoy the scenery of the mud flats and water. Once on the island, follow the road as it veers left. Do not take the road to the visitor’s center. Follow the signs to White Rock Bay. We’ll have some race signs out on race day to help those that are directionally challenged. Once you get to the race area, you will be directed where to park by our friendly staff of parking enforcers.

Finish Line Stuff

We’ll have some sort of food for you to eat when you finish. My lovely wife will once again make buffalo chili for everyone. We’ll do a vegetarian version as well. Soda, homebrew, cookies, maybe some other stuff. We’ll have a large canopy up and we’ll see about getting some sort of heat in there to take the chill off.


So, everyone that finishes will get a nifty coffee mug as a small token of your awesome accomplishment. The overall male and female will get some sort of trophy.

Miscellaneous Stuff

You may encounter Bison out on the course. The first year there were some blocking the trail for the front runners just a quarter mile from the finish. No, you don’t get time compensation for buffalo delays. Go around the animals if you can, or just wait them out. Your call. Usually the females will move out of the way. Lift a tail and check if you’re not sure of the gender. If you can do that, then you’ll probably be eligible for a Darwin award. If you have family following you, make sure they don’t speed. The speed limit on the island is 25 mph except for the ranch road, where it’s 40 mph. The rangers do write tickets.

Event List

Buffalo Run (25k) - March 10th 2018

Buffalo Run (100miler, 50 miler, and 50k) - March 23rd - 24th 2018

Logan Peak Trail Run - June 16th 2018

Harriman Park 25k/50k - August 18th, 2018

Fall Classic 50k - November 11th, 2017

MTN View Trail Half Marathon - November 11th, 2017

Refund, Rollover, and Transfer Policy

Antelope Island Map

Email the RD

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