Utah Border Sign – Utah Border Marker loop from Mack

If you're looking for a gravel biking route that delivers big desert scenery and a true sense of solitude, the Utah Border Sign – Utah Border Marker loop from Mack is definitely worth your time. This moderate 19.6-mile (31.5 km) loop packs in 878 feet (268 metres) of climbing, taking about 2 hours and 26 minutes to complete, making it a fantastic option for experienced riders seeking a remote escape in spring or fall.

What to expect on Utah Border Sign – Utah Border Marker loop from Mack

Expect a journey through classic high desert terrain, where hard-packed dirt roads give way to sections of chunky gravel and even some unexpected sand traps, especially early on. While much of the route can be fast, you'll encounter short, steep inclines that will test your legs. The reward is expansive, remote views unique to this area, with minimal car traffic and opportunities to spot wildlife like mule deer and antelope. This route is best for riders with some technical skill to handle the sandy patches and who appreciate the quiet challenge of a remote ride.

Planning your visit

Given the remote nature of this loop, self-sufficiency is key. There are no services along the way, so carry plenty of water, food, and bike repair supplies. The intense summer heat makes riding dangerous and unmanageable due to exposure and lack of shade; spring and fall are the ideal seasons to tackle this route. Parking is available at the start point near Mack, Colorado, but always check current conditions before heading out.

Trail details

• Distance: 19.6 miles (31.5 km)
• Elevation gain: 878 feet (268 metres)
• Difficulty: moderate
• Estimated time: 2 hours and 26 minutes