Nobody checks a pass at Sunset Hills or on the Bridger Creek Golf Course trails. The Bridger Ski Foundation keeps more than 80 kilometers of winter trails in and around Bozeman groomed and open to anyone. Its trail pass is voluntary. A large share of the money behind that system comes in over two days at the Gallatin County Fairgrounds. The 58th annual BSF Ski Swap opens this Saturday, November 7.
Every used pair of skate skis or outgrown kids' boots that sells at the Swap puts a quarter of its price toward the same trails a lot of buyers will ski on first.
A free trail with a $200,000 budget
The Bridger Ski Foundation says on its trail pass page that grants, sponsorships and trail passes fund the more than $200,000 its Trails Program needs each year. The City of Bozeman is a partner on Sunset Hills, but BSF says it alone covers the cost, grooming and maintenance of the community Nordic trails across all seven venues.
BSF's trail directory lists those seven venues:
- Bridger Creek Golf Course
- Sunset Hills, formerly called Lindley
- Highland Glen
- Bozeman Creek and Sourdough Canyon
- Hyalite Canyon, which BSF says the U.S. Forest Service mostly grooms
- A 1-km loop at Sacajawea Middle School
- A 1-km loop at Chief Joseph Middle School
The trails cross land held by a long list of partners. BSF names Montana Fish, Wildlife & Parks, the Gallatin Valley Land Trust, Gallatin National Forest, Bozeman Health, the City of Bozeman, Bridger Creek Golf Course, Montana State University and Sacajawea Middle School as partners that make access possible. Land access comes through all of them. The bill for grooming lands with one nonprofit.
None of the trails charge at the trailhead, so that bill gets paid through voluntary passes, donations, sponsorships and grants. The Swap is the one that turns into a party.
Why a gear sale carries so much weight
Explore Big Sky reported on October 1 that the Swap is BSF's largest annual fundraiser. The money supports youth ski programs for about 1,000 local children, scholarships, more than 80 kilometers of groomed trails around Bozeman, and snowmaking at Sunset Hills. Lively Times described it the same way in its October 21 preview.
The model is simple. Anyone can consign gear, and if it sells, BSF keeps 25% and mails the seller a check for the rest. With more than 10,000 items covering alpine, Nordic, snowboarding and backcountry, those quarters add up. Unsold gear also stays in town. Anything not picked up by 5 p.m. Sunday is kept by BSF, and Big Sky Youth Empowerment gets first choice of those donations.
BSF Communications Director Jenny White explained the reasoning in a press release quoted by Explore Big Sky:
"For us, it's also one of the ways we can keep skiing more accessible in our community, by recirculating winter gear and making it more affordable to get a winter setup."
The same sale that makes a winter setup cheaper also pays for grooming.
The weekend, in order
All times come from BSF's Ski Swap page, which has the full details.
- Friday, Nov. 6, drop-off at Building 2. The preferred registration window closed Tuesday night at 11:59 p.m. If you registered by then, drop-off runs from 10 a.m. to 7 p.m. and costs $1 per item. If you didn't, you can still consign: late items cost $3 each and drop off from 1 to 7 p.m. Computers for last-minute registration are in Building 4, the Swap office, and BSF warns there will be a wait to print tags. Consignment fees are cash only.
- Saturday, Nov. 7, 8 a.m. Volunteers come in first. Volunteering requires a current 2026–27 BSF membership or trail pass, and a few special volunteer roles start at 7:30 a.m.
- Saturday, 9 a.m. BSF members and trail pass holders shop next.
- Saturday, 10 a.m. to 6 p.m. The public sale opens. Entry is $5 in cash or Venmo, and children under 12 get in free. Checkout takes cash and credit cards.
- Sunday, Nov. 8, 10 a.m. to 2 p.m. Entry is $2 until noon and free after that. Sellers could choose to have their items discounted 10%, 25% or 50% for all of Sunday, so prices on some tags drop.
- Sunday, 2 to 5 p.m. Sellers pick up unsold items at Building 1, and sales continue during pickup. BSF posts a list of unsold items Saturday evening and again around noon Sunday.
The order of the doors connects back to the trails. A trail pass is a voluntary donation for grooming, and it also gets you into the Swap an hour before the public. BSF sells individual and family passes and memberships online, and you can pick up your early-entry bracelet at the BSF table on Friday or outside the entrance Saturday morning. Pass prices went up at the end of October, so check the trail pass page for current tiers.
Two rules matter before you pay. All sales are final, with no refunds or exchanges. BSF also warns that bindings older than 10 to 12 years may no longer be indemnified, which means shops may refuse to remount them and the bindings may be unsafe. Check the binding before you get excited about a cheap pair of skis.
The weekend has a raffle too. Tickets are $100 for a seven-day trip for two with Lumi Experiences, a cross-country ski tour company, with a choice of Slovenia and Italy or Norway in 2027 or 2028. The drawing is November 8 at the Swap, and you don't need to be there to win.
Where the first in-town snow comes from
The Swap money shows up on the trails fastest at Sunset Hills. The roughly 5-kilometer system sits next to Lindley Park, across the street from Bozeman Health, and BSF calls it the centerpiece of Bozeman's groomed trails. BSF started grooming there in the late 1960s and estimates winter use has grown about 5,000% since.
Sunset Hills doesn't have to wait for natural snow. BSF raised nearly $1 million in a capital campaign for a snowmaking system, including $150,000 in cash-in-lieu-of-parkland funds approved by the City of Bozeman. Crews began making snow in late November 2020. The system uses a well BSF first drilled in 2005, plus a 32,000-gallon underground cistern that cools the water.
According to BSF's Sunset Hills project page, the timing depends on weather:
- Snowmaking depends on the wet bulb temperature, a combination of temperature and humidity. Bozeman usually reaches the ideal range in late November or early December.
- Up to five HKD Impulse snow guns can run at once, which BSF says can get Sunset Hills ready to ski in as little as a week.
- The goal is a stable base by mid-December that lasts through late March.
- Making one 1-kilometer loop takes an estimated 45 to 50 hours of snowmaking, so crews plan to start with a single loop and expand from there.
The cost and the money are directly linked. BSF says it has a finite budget for snowmaking and grooming. That budget can grow if more people support the Trails Program through voluntary passes and donations, which means more snowmaking and more grooming days. Every hour of snow-gun time comes out of the same fund the Swap's 25% goes into.
For comparison, The BoZone reported on October 10 that Bridger Bowl's projected opening day is December 11. That's in the same early-December stretch BSF expects snowmaking weather to arrive, so Sunset Hills is likely the closest skiing to downtown at the start of the season. When it opens depends on weather, not a set date.
Before the first lap on Swap gear
Once the trails are skiable, BSF publishes real-time grooming updates and color-coded maps on its grooming report page through Nordic Pulse. It also sends trail updates by email.
Dog rules differ by venue. BSF's guide to Bozeman's community ski trails, published in 2023, allows dogs on the groomed trails at Sourdough and Hyalite under voice control, with owners picking up after them. It keeps dogs off the groomed ski trails at Bridger Creek, Highland Glen and Sunset Hills. Highland Glen has one exception. BSF has since rerouted part of its separate multi-use trail and connected it to Peet's Hill. BSF's 2024–25 annual report calls the route the Winter Ramble. The multi-use trail is open to walkers, bikes, skiers and leashed dogs, while the traditional ski trails stay ski-only.
If you're bringing home a new setup this weekend, it's a good time to buy the trail pass that helps pay for the grooming.
At Ryan Martello Real Estate, we track the local institutions that keep Bozeman winters running, like the Swap at the fairgrounds and the snow guns at Sunset Hills. If you'd like to talk through which part of the valley puts you closest to the trails you'll use most, schedule a consultation with Ryan.
