Armstrong to Spiro

Spiro Bike Trail

Armstrong to Spiro, a Park City Mountain Biking Classic

Armstrong Trail to Spiro is a favorite Park City mountain bike ride for good reason. Armstrong Trail, a recent addition to the Park City trail network, is designated uphill only for bikes. The trail features a gentle grade to the top that let’s riders settle into a mellow spin, or if for your inner-masochists, a lung-busting sprint to the top. After clocking nearly 2000 ft of elevation gain, Park City’s infamous Spiro Trail features a fast and flowy descent through aspen groves to the bottom. At this time, Spiro is still multi-directional so riders must keep their speed in check as you will most certainly encounter oncoming hikers, wildlife, and bike traffic.

Getting to Armstrong and Spiro Trails

This ride begins and ends in the same place. To access the trailhead, park in the Silver Star Cafe lot. On weekends, or for overflow parking, park in one of the lots at Park City Mountain Resort and cruise down Three Kings Drive to the trailhead. From the trailhead, keep to the right to merge onto Armstrong Trail. From there, it’s a steady climb to the top. Those looking for a shorter option, can hit the HAM trail about two-thirds the way up the climb which also links up with the Spiro downhill trail. After ascending Armstrong, you’ll stay left on the Mid-Mountain Trail for another short climb to the apex of the ride. After a quick descent on the Mid-Mountain, you’ll come to the Spiro Trailhead on your left. From here, you’ll descend down buttery-smooth single track that whoops over creek beds and twists and turns through aspen trees.

View directions to the Spiro/Armstrong trailhead on Google Maps.

When to Ride Armstrong to Spiro

Most years the trail is dry by June, however, on big snow years it might not be ready for bike traffic until July. The trail is heavily wooded and provides plenty of shade making it a great option all throughout the summer. Due to the popularity and easy trail access, it can get busy on the weekends. We recommend riding mid-week as well as during morning and evening hours when possible. If you’re fortunate enough to hit this trail during the peak fall months, you’ll be treated to vibrant golds and oranges as the aspen’s prepare for winter.

Armstrong & Spiro Trail Conditions

For up-to-date trail conditions, visit the Mountain Trails Foundations Conditions Map. Feel free to leave a comment if you’ve ridden the trail lately or have more recent trail beta.

Armstrong to Spiro Apres Bike

Post-ride, spin over to the nearby Silver Star Cafe at the base of the Silver Star chair for some celebratory beer and/or grub.

View Armstrong to Spiro elevation profiles along with complete ride stats on Strava.

About the author


Alex is a designer by trade & mid-grade adventurer by night who’s quite partial to knobby tired bikes, clean design, & dirty hands. When not updating this silly website, he's likely off exploring the nearby hills with a few of his favorite partners in crime.


  • From Mountain Trails Foundation:

    MTF Weekend Update > the crew cleared upper Armstrong to Mid Mtn Yesterday. Bob from Basin Recreation informed us a trail fairy cleared Mid Mtn from Pinecone to King Rd before his crew could get in there- he said it’s snow free!

    MId Mtn from Empire Link Intersection to the Ontario Bypass Interstectio has 20-plus blowdowns and snow on several of the DV ski run crossings – the MTF crew will be tackling that section early next week.

    PCMR has given the green light on Jenni’s- there is still a large patch of man-made snow before the CMG intersection. Empire Link and John’s/John’s 99 are also clear.

    Enjoy the weekend out on the trails. Be safe and aware of one another out there!

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