Big Sky Biggie 2025 Course Maps
First, this race would not be possible without the cooperation and generosity of several land owners and managers in the Big Sky area. Our courses travel in and out of private and public lands. Putting the routes together, while being mindful of hazards, roads, horse traffic, easements and just good ole’ fashioned manners was not easy. There were numerous conversations, edits, phone calls, meetings, more edits, and then more favors being asked.
It is critical that you read all the information on this page.
Please do not skip ahead to the course maps.
Once a year, land owners open their gates to the Biggie.
Our courses travel through public and private lands, and the connectivity of our course routes rely on private land owners to provide access. Buckle-up for an incredible ride through some of the most well-built flow trails in the Mountain West. We've also included some old school trails to keep it hard-earned.
New for 2025 - Better Start Route!
We’re thrilled to announce a new start to the 50- and 30-mile courses, thanks to Big Sky Resort. This updated route features a longer dirt road climb early on to help spread out the field before dropping into technical singletrack, and for the first time ever, you’ll descend Snake Charmer, a legendary trail in the Big Sky Downhill Bike Park.
IMPORTANT – This new route is NOT open for pre-riding. Anyone attempting to pre-ride the climb up to the top of Andesite will be putting the entire event in jeopardy. You can purchase a DH Bike Lift pass and pre-ride Snake Charmer.
No Pre-Riding Zones
There are two major sections that are not open for pre-riding: Big Sky Resort Downhill Park section and the Spanish Peaks trails.
Our land-use agreements depends on the ability of all participants to respect these closures. We’re counting on you to behave yourselves!
This map shows the no pre-riding zones in bright red.
Please follow our pre-riding routes on the website.
50 Mile Course
Total Miles: Approx 48 miles
85% Singletrack
Around 7,500′ + Elevation Gain
Average Estimated Finish Time: between 5 and 7 hours (Fastest is 4.5 hours / Slowest is 8.5 hours)
The 50 Mile Racers have a dedicated start wave and neutral roll-out to get you through Town Center. You’ll climb Huff’s Trek to the Big Sky Resort base area, and then climb a dirt road to the top of Andesite Mountain, which will have your first Aid Station. You’ll then descend a machine-built flow trail that is part of the Big Sky Resort Downhill Park called Snake Charmer, which leads straight into the famous Mountain to Meadow. Your second Aid Station will be located at the bottom of Mountain to Meadow. From there we will be routing you up to the Spanish Peaks neighborhood with a paved road climb, and then you’ll ride some single-track on your way to Fish Camp. After Fish Camp, you’ll hit Aid Station #3, and from there you’ll start out to do the infamous Mules Loop – riding the Mules in the clockwise direction: Up First Yellow Mule and Down Second Yellow Mule. The Whiskey+Bacon Aid Station will be waiting for you at the top of First Yellow Mule. The YC Patrol Aid Station will be about halfway down Second Yellow Mule.
Downhill Timed Segment on Second Yellow Mule. Read about the Mule Skinner Award »
There is a 12pm Time Cut-Off at Aid Station #3. Read more »
30 Mile Course
Total Miles: Approx 31 Miles
85% Singletrack
Around 4,500′ + Elevation Gain
Average Finish Time: between 3.5 and 4 hours (Fastest is sub 3 hours / Slowest is 6 hours)
The 30 Mile Racers will have a dedicated start wave and neutral roll-out to get you through Town Center. You’ll climb Huff’s Trek to the Big Sky Resort base area, and then climb a dirt road to the top of Andesite Mountain, which will have your first Aid Station. You’ll then descend a machine-built flow trail that is part of the Big Sky Resort Downhill Park called Snake Charmer, which leads straight into the famous Mountain to Meadow. This entire segment (Snake Charmer > M2M) will be the MonTANNER DH Timed Segment. From there we will be routing you up to the Spanish Peaks neighborhood with a paved road climb, and then you’ll ride some single-track on your way to Fish Camp. Your third (and final) Aid Station is at the end of the Fish Camp double-track. The finish into town travels through First Yellow Mule -> Ralph’s -> Uplands — and includes a new fun downhill flow section!
15 Mile Course
This course is perfect for beginners and juniors. This year’s course is approximately 14 mile and features all the best town trails. Almost all of the climbing on this course will be done at the beginning on pavement, although there is one sneaky switchback section on Ralph’s Pass that’ll raise your heart-rate. The finish into town travels through First Yellow Mule -> Ralph’s -> Uplands — and includes a new fun downhill flow section!
Your Aid Station
There is one Aid Station on your course, about 2/3 of the way through your course. This Aid Station is also known as Aid Station #3 (because it’s the third aid station in the 30 and 50 mile courses). This Aid Station will be stocked with water, Skratch hydration, and snacks. There are no spectators allowed at this Aid Station. The footprint for this aid station is very small. Having extra traffic or vehicles attempting to access this Aid Station poses a safety risk for the entire field of racers, and puts our permit in jeopardy.
Time Cut-Offs
Look, nobody wants to pull you from the race. Our whole mission is to provide you with an amazing day on the bike and watch you succeed. However, we have 9 different use permits and agreement with land-owners for this event, which require us to vacate their land so that their normal daily operations may continue. We rely on volunteers who donate their entire day to the event. But we need to have their safety in mind and will not ask them to stay out on the course for longer than is reasonable. We ask that you have these priorities in mind if we ask you to scratch from the event.
Time cut-off for the 50 Mile Course is at Aid Station #3 at 12:00pm
If 50 Mile racers have not arrived to Aid Station #3 (Critical Junction) by 12pm, they will be routed to the finish, using the 30 mile course. They will be a DNF for their event.
There are no official time cut-offs for the 30 or 15 Mile Courses at this time.
However, if our safety team and sweepers determine that it’s in the best interest of the race for you to scratch at a certain point, we will ask you to do so.