Best natural monuments around Fort Collins include a diverse range of natural areas and geological features. The region features reservoirs, mountain open spaces, and expansive grasslands. These natural spaces provide opportunities to explore varied landscapes and observe local wildlife.
Last updated: July 9, 2026
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The Boyd Lake Trail is a 7-mile paved trail that takes you along the banks of Boyd Lake. The trail is completely flat and gives you wonderful views of the water.
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Horsetooth Rock is an iconic landmark in the Fort Collins area. To get to the summit you must dismount your bike and complete a short scramble here up to the summit. Although the scrambling is relatively easy, it is a little exposed in places and there can sometimes be loose gravel over bare rock faces. Just move carefully, deliberately, and don't be afraid to slide on your butt on the way down! After scrambling up, you get fantastic panoramic views from this long, exposed rock summit of the surrounding area. You get especially great views of Horsetooth Reservoir, which is named after the formation you're standing on. Since the summit is fairly large, even on crowded days you can usually find a spot to eat a snack and take photos away from other people. As you explore, just be aware of steep drop offs, large gaps between rocks, and loose gravel over bare rock.
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Arthur's Rock lies just off the main Arthur's Rock Trail down a short spur trail. After cresting a steep gully, you arrive at the summit of the very popular Arthur's Rock. From this large rocky summit, you get fantastic views of Horsetooth Reservoir and the surrounding area. This is a great place to find a comfortable seat and take in the views before heading back down the gully to the main trail.
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The Keyhole is well-known a unique arch along the amazing Devil's Backbone. This short detour off the main trail takes you more or less right up to the Keyhole where you can take some amazing photographs. You can then retrace your steps, or continue onward and loop back onto the main Wild Loop trail.
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After scrambling up a series of short, but exposed feeling, ramps and ledges you reach the top of the iconic Horsetooth Rock. You get fantastic panoramic views from this long, exposed rock summit of the surrounding area, with especially great views of Horsetooth Reservoir, which is named after the formation you're standing on. Since the summit is fairly large, even on crowded days you can usually find a spot to eat a snack and take photos away from other people. As you explore, just be aware of steep drop offs, large gaps between rocks, and loose gravel over bare rock.
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Arthur's Rock lies just off the main Arthur's Rock Trail down a short spur trail. After cresting a steep gully you arrive at the summit of the very popular Arthur's Rock. From this large rocky summit, you get fantastic views of Horsetooth Reservoir and the surrounding area. This is a great place to find a comfortable seat and take in the views before heading back down the gully to the main trail.
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For families, View of Boyd Lake is an excellent choice, offering a 7-mile paved, flat trail suitable for all ages, along with opportunities for fishing, swimming, and biking within the State Park. Fossil Creek provides a tranquil natural area with a trail crossing a sanctuary for birds and wildlife. Additionally, Coyote Ridge Natural Area features the engaging "Hidden Clues Trail" with interactive interpretive signs, perfect for young hikers.
Yes, for a challenging experience, consider the hike to Horsetooth Rock. Reaching the summit involves a scramble up ramps and ledges, offering fantastic panoramic views. Horsetooth Mountain Open Space, where Horsetooth Rock is located, also provides other challenging trails with magnificent views.
Fort Collins offers several excellent spots for wildlife. Fossil Creek is a natural habitat for many birds and other wildlife. Cathy Fromme Prairie Natural Area is ideal for birdwatching, especially for hawks and eagles in winter, and spotting horned lizards and ground-nesting songbirds. Soapstone Prairie Natural Area is notable for its large, genetically pure plains bison herd, particularly visible from March to November. Bobcat Ridge Natural Area is home to elk, wild turkeys, and mountain lions.
The natural monuments around Fort Collins showcase a diverse range of features. You can find iconic summits like Horsetooth Rock, serene rivers such as Fossil Creek, and large lakes like View of Boyd Lake. Other areas feature unique rock formations like The Keyhole, and waterfalls such as Horsetooth Falls. Beyond these, you'll encounter red sandstone hogbacks, grassy meadows, pine forests, shortgrass prairies, and vast open landscapes.
Yes, View of Boyd Lake offers a 7-mile paved trail that is completely flat, making it wheelchair accessible and providing wonderful views of the water.
The natural monuments around Fort Collins offer a wide array of outdoor activities. You can enjoy hiking, mountain biking, horseback riding, and trail running at places like Lory State Park and Bobcat Ridge Natural Area. Water activities such as camping, fishing, kayaking, paddleboarding, and canoeing are popular at Horsetooth Reservoir and View of Boyd Lake. Birdwatching is exceptional at Pawnee National Grasslands and Cathy Fromme Prairie. For more specific routes, you can explore guides for Running Trails, Road Cycling Routes, and Gravel Biking around Fort Collins.
For unique geological formations, The Keyhole is a well-known arch located along the Devil's Backbone. This short detour provides excellent photo opportunities. Horsetooth Rock itself is an iconic landmark with its distinctive shape resembling a horse's teeth.
Yes, Horsetooth Falls is a 20-foot waterfall located in the heart of Horsetooth Mountain Open Space. You can relax at the base, cool off in the mist, and even go behind the falls, though caution is advised due to wet rock.
Fort Collins' natural monuments offer beauty year-round. Spring and fall provide pleasant temperatures for hiking and outdoor activities. Summer is ideal for water activities at Horsetooth Reservoir and Boyd Lake. For bison spotting at Soapstone Prairie Natural Area, visit between March and November. Birdwatching is excellent year-round, with specific species like hawks and eagles more prevalent in winter at Cathy Fromme Prairie.
Yes, several natural areas offer loop trails. Pineridge Natural Area features a 4-mile loop trail that also connects to the larger Spring Creek Trail System and Foothills Trail System. Coyote Ridge Natural Area offers a 7-mile round trip with scenic vistas, and the Boyd Lake Trail is a 7-mile paved loop around the lake.
Soapstone Prairie Natural Area is recognized as one of the best spots for stargazing in Northern Colorado, offering vast, open landscapes away from city lights.
Mountain biking is a popular activity in several natural areas. Bobcat Ridge Natural Area offers trails like the Foothills Trail, and Coyote Ridge Natural Area is a popular destination for mountain bikers, connecting to the Blue Sky Trail. Lory State Park also provides over 26 miles of trails suitable for mountain biking.
Horsetooth Mountain Open Space, particularly from the summit of Horsetooth Rock, provides magnificent panoramic views of the reservoir and the city. Lory State Park also offers stunning views of Horsetooth Reservoir from trails like Arthur's Rock.


Extend your search for the best caves by checking out these guides of the top ones around Fort Collins: