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National Geographic Trails Illustrated Map for RMNP contains detailed topographic information, clearly marked trails, recreational points of interest & navigational aids.

estes park hikes
Best Estes Park Hikes offers details on 20 hikes near Estes Park, from short and scenic, to challenging adventures, including the 11,428-foot summit of Twin Sisters Peak.

Odessa Lake (via Fern Lake Trailhead)

Trail Features: Outstanding Lake Views, Fall Aspens odessa lake
Trail Location: Fern Lake Trailhead
Roundtrip Length: 9.5 Miles
Trailhead Elevation: 8165 Feet
Total Elevation Gain: 1890 Feet
Avg. Elev Gain / Mile: 398 Feet
Highest Elevation: 10,033 Feet
Trail Difficulty Rating: 13.28 (strenuous)
Parking Lot Latitude 40.35483
Parking Lot Longitude -105.63109

Trail Description:

This hike to Odessa Lake begins from the Moraine Park area. To reach the trailhead from Bear Lake Road, follow Moraine Park Road for a half-mile to an unmarked junction - just before reaching the Moraine Park Campground. Turn left at the junction and drive roughly 1.9 miles to the Fern Lake Trailhead. Along the way you'll pass the Fern Lake shuttle stop. You'll have the option of taking the free park shuttle from the Moraine Park Visitor Center, but you'll have to walk an additional eight-tenths of mile along the dirt road to reach the trailhead.

The Fern Lake Trail follows the Big Thompson River all the way to The Pool, and alternates between forest and a few open areas that provide some pretty good views of the Big Thompson Valley. Along the way you'll pass through a mixed forest of aspens, lodgepole pine, ponderosa pine, cottonwoods and willows, as well as a variety of wildflowers in the spring and summer.

This trail was mostly constructed and maintained by lodge keepers and local tourism boosters in the early 1900s. As a result of its roll in early park tourism, the Fern Lake Trail was listed on the National Register of Historic Places in 2005.

arch-rocksRoughly 1.2 miles from the trailhead hikers will pass through Arch Rocks, a couple of house-sized rocks that presumably landed on this spot when a large boulder fell from the cliffs above and split apart.

At 1.7 miles you'll reach the Cub Lake Trail junction. This also marks the spot where Fern Creek meets the Big Thompson River. This confluence forms the turbulent waters known as The Pool, and is a popular area for picnics and fishing.

Located near The Pool is the former site of the Forest Inn. Established in 1917, the Forest Inn featured a lodge, dining room, lounge and several cabins throughout its lifespan. The resort was sold to the National Park Service in 1952, and was razed in 1959.

Much of the area around The Pool was scorched during the Fern Lake Fire in the fall of 2012. The wildfire burned 3500 acres in the lower Forest Canyon, Cub Lake and Moraine Park areas, making it the largest wildfire in Rocky Mountain National Park history. It's believed the fire was sparked by an illegal campfire on October 9th. Although it was a low intensity fire, and for the most part remained under control, it still forced the closure of almost all the trails in the Moraine Park and Bear Lake Road areas for several weeks. That all changed on November 30th when a fierce wind storm brought 70 mph gusts that pushed the fire 3 miles in only 35 minutes, and more than doubled its size as it raced across Moraine Park. At its peak more than 600 fire fighters were assigned to the blaze. The fire was all but fully extinguished when heavy snow arrived in mid-December.

Roughly two-tenths of a mile beyond The Pool is the side trail that leads to the Old Forest Inn Backcountry Campsite, which contains two individual sites. Just past the campsite the trail begins a relentless climb of almost 400 feet over the course of the next seven-tenths of a mile to reach the base of Fern Falls, a beautiful 60-foot waterfall that plunges down Fern Creek.

From the waterfall the trail resumes its climb, and ascends another 650 feet over the course of the next mile.

Roughly 3.7 miles from the trailhead hikers will reach the Spruce Lake Trail junction. This pleasant lake can be reached by hiking eight-tenths of a mile up a fairly rugged trail. The Fern Lake Individual Campground (four individual campsites) is also located on this side trail, roughly one-tenth of a mile above the junction. In 2003 two campers, in two separate tents, were bit and clawed by a black bear at this campground. In both incidents the bear attacked the campers from outside their tents while they were sleeping. Thankfully neither camper was seriously injured during this extremely rare event. The last bear attack, in or around the park, occurred in 1971 when one person was killed while camping on private property north of Grand Lake.

fern lakeFern Lake is an easy walk of only one-tenth of a mile from this junction. Just prior to reaching the shore you'll pass the Fern Lake Patrol Cabin. This historic cabin was built in 1925, and functioned as a ranger station until 1949.

Just beyond the cabin hikers will arrive at Fern Lake, roughly 3.8 miles from the trailhead. The north shore of the lake offers great views of 12,129-foot Notchtop Mountain, 11,586-foot Little Matterhorn, 12,331-foot Knobtop Mountain and 11,018-foot The Gable.

In the early 1900s Dr. William J. Workman began building a fishing lodge along the shores of the lake. This would eventually evolve into the Fern Lake Lodge, which included a dining room, as well as a dormitory and log cabins that could accommodate up to 55 people. Although the lodge ceased most operations in the late 1930s, it continued serving light snacks through the 1950s. During the summer of 1958 the lodge was managed by future folksinger Judy Collins and her husband. In 1976 the National Park Service razed the property and returned it to its natural state.

little-matterhornFrom the north shore of the lake the trail continues by crossing a fairly long footbridge over Fern Creek, and then passing the side trail that leads to the Fern Lake Group Campsite (one group site). After walking about a quarter-mile, and climbing roughly 50 feet, you'll reach an overlook area that provides even better views of Fern Lake, in my opinion. Standing prominently behind the lake from this vantage point is 12,922-foot Stones Peak.

From here the trail continues its climb towards Odessa Lake. At roughly 4.6 miles from the trailhead you'll reach a short side trail that leads to the foot of the lake. This side trail also provides access to the Odessa Lake Backcountry Campsite (containing two campsites).

Odessa Lake is another fantastic destination in Rocky Mountain National Park. The views of the surrounding mountains are simply outstanding. Looking from your left (due south) to right, you'll be able to see 12,324-foot Flattop Mountain, 12,129-foot Notchtop Mountain, 11,586-foot Little Matterhorn (the prominent mountain in the photos above and below), 12,331-foot Knobtop Mountain, 11,939-foot Gabletop Mountain and 11,018-foot The Gable.

odessa lake

Odessa Lake can also be accessed from the Bear Lake Trailhead. Although both routes are roughly equal in distance and elevation gain, the route from Bear Lake is far more scenic in my opinion.