The Four Seasons of Horsetooth Mountain Bike Challenge is a grass-roots un-event with no entry fees and no real start times and is ridden on the two solstices and two equinoxes in Horsetooth Mountain Park and Lory State Park. By being required to complete at least three seasonal stages, we hope it encourages you to come ride if your schedule doesn’t permit on any given stage.   The course is designed to offer what we think are the best sections of trail in our backyard.  The course should take about 2-3 hours.  Had fun in the autumn? Bring a friend for the winter stage!  Don’t own a fancy team kit or 20lb race bike? Neither do we! Come ride for the fun and challenge of completing all four events!  Check out the rules here.

4SOH takes place in Lory State Park and Horsetooth MTN Open Space. It is with respect that we acknowledge that 4SOH is run on the traditional and ancestral homelands of the Arapaho, Cheyenne, and Ute Nations and peoples.

SEASONS CHANGE - SEE YOU THERE 

"Thanks so much for organizing and maintaining this event! This was my first time riding, and really REALLY enjoyed the route. I'm looking forward to attempting all 4 stages next year."
-M.                                                                                                  

"Just finished my first running of the 4SOH event. What a blast! Super hard!"
-J.

"This now ranks with my top three "so glad to be finished" rides/races: 40 in the Fort, Steamboat Stinger and 4SOH Winter!"
C.

"I second C's praise to the organizers for coming up with a fun course that can be motivating during this lazy season."
-B.

"I really want to thank the organizers and whoever came up with this brilliant idea! I'm a typical sit-on-the-couch-and-wait-for-spring rider, but this got me motivated to at least try to ride the snow. I didn't finish, but I am really happy I got out there."
C.

“….wanted to thank you guys for putting together a cool event.”
-M.

“Fun challenge, thanks for putting it out there. Excellent course, wish 40 in the Fort used it, maximum fun/effort ratio.”
-D.

"Awesome idea, thanks for putting this friendly competition together.”
-T.

“Thanks for setting this up, really enjoyed the course and look forward to doing it again!”
-J.

“Saw several other riders out on the course, had a blast, and it hurt. A lot.  Thanks for putting this together, awesome idea!”
-B.

I'm in because I've been wanting to do a race and this seems like my kind:  grass roots, few amount of people, no aid stations and sounds like fun."
-M.

“Thanks for putting this together.  Really fun.  Can't wait for the winter session!”
-P.

“My result for the amazing un-race. Thanks for a great event. Had a total blast.”
-M.

I rode the route today for the first time. The downhill starting on Wathen was awesome. The climb up Kimmons at the ends was painful. It was fun and I know I will have a lot of room for improvement.
-M.

“Great route and really excited you got something like this going!”
-R.

“First time racer here. Great course! Since I moved here I’ve managed to avoid South Ridge…man, that’s brutal.”
-B.

"Thank you for putting forth the effort and imagination to create an event, a website, playlist, and everything else you have started for the event. Hopefully it keeps going smoothly."
-M.

Despite the un-eventness of it all, it's a lot of fun and it was a great idea.  Gets people to go out and push it a little bit, and I've actually made a few new friends through the whole thing.
-B.

"I want to salute you for creating a grassroots inspired event that will hopefully get people on their bikes and spurs on the local biking community. For everyone who participates, have fun."
-J.

“Hard Man,
You are so hard!!!!
Me not too much
Here is my time.”
-M.

“By the way, I loved the first section from timber. I have never ridden it that way as I usually just hit timber. I ate sh*t about two minutes into the ride on a nasty pedal strike trying to make up time for what I knew I was going to lose on the climb later. So I have a nice little keepsake on my knee.  Thanks again and I hope to make all the races.”
-J.

My wife and I are so committed to 4SOH that we took turns watching our daughter, so both of us could ride it on our anniversary LOL! Might be the best anniversary activity ever.
-C.