Overview
Grizzly Lake is the hike you do when you want the caliber of scenery that the Maroon Bells are famous for, without the shuttles, the crowds, or the permit logistics. This 8-mile out-and-back gains 2,000 feet of elevation as it climbs from Highway 82 (the Independence Pass road) through some of the best wildflower meadows in the Elk Mountains to an alpine lake ringed by 13,000-foot ridgelines in the Maroon Bells-Snowmass Wilderness of White River National Forest. The nearby Lost Man Loop, a few miles west on Highway 82, covers three high-country lakes at similar elevation with slightly less gain and a loop format instead of an out-and-back.
The trail is rated moderate-hard, and that rating is fair. The first couple of miles are mellow, but the upper half steepens considerably as you push through dense forest and then above treeline into the lake basin. The total effort is substantial: 8 miles and 2,000 feet of gain at elevations ranging from 10,300 to 12,300 feet. Altitude is a factor here. But the reward is an alpine lake that sees a fraction of the visitors that Maroon Lake or Crater Lake attract, in a setting that's every bit as dramatic.
No permit is required. No shuttle. No timed entry. Dogs are allowed on leash.
The Route
Miles 0 to 1.0: Meadow and aspen forest. The trail begins from a small pulloff on the south side of Highway 82, about 10 miles east of Aspen and roughly 2 miles below the ghost town of Independence. Cross the Roaring Fork River on a footbridge and enter a broad meadow. In late July, this meadow is spectacular: acres of columbine, larkspur, Indian paintbrush, lupine, and aster. The trail is well-defined and gentle, climbing gradually through the meadow and into stands of aspen and spruce.
Miles 1.0 to 2.5: Forest and creek. The trail follows Grizzly Creek upstream through dense spruce-fir forest. The grade is moderate, with a few steeper pitches. The creek provides a steady soundtrack, and there are several nice spots where the trail parallels the water through small openings in the forest. Wildflowers continue in the forest margins and clearings. This section is shaded and cool, even on warm days.
Miles 2.5 to 3.5: Steeper climbing. The trail steepens noticeably as it begins the push toward the upper basin. Several switchbacks gain elevation through the forest, and the trees begin to thin. Views open up behind you toward Independence Pass and the peaks along the Continental Divide. This is the section that separates the moderate from the hard. The altitude (now above 11,000 feet) starts to make itself felt, and the grade is relentless.
Miles 3.5 to 4.0: Treeline and the lake. The forest falls away and you emerge above treeline into the alpine zone. The trail crosses a final stretch of rocky terrain, threads through boulders, and arrives at the shore of Grizzly Lake at approximately 12,300 feet. The lake is dark, cold, and deep, sitting in a cirque carved by glaciers. The ridgeline above rises to 13,300 feet on multiple sides, with steep talus slopes and snow patches clinging to the upper faces well into August. The setting feels remote and wild, a stark contrast to the manicured trails around Maroon Lake just a few miles to the west.
At the lake: Flat rocks along the north and east shores provide spots to rest and eat. The lake is cold (even in August, water temperatures hover in the low 40s) and exposed to wind. There's no tree cover at the lake, so bring sun protection and a wind layer. On a calm day, the reflections of the surrounding ridgeline in the lake surface are exceptional.
Return: Retrace your steps. The descent goes faster, typically 1.5 to 2 hours.
When to Hike
July through October is the practical season. The trail's high starting elevation and the lake's location above treeline mean snow lingers longer here than on lower trails.
July: The wildflower meadows near the trailhead are at their peak in the second half of July. Snow may still be present on the upper trail and around the lake, especially after heavy-snow winters. Bring traction devices (microspikes) if hiking before mid-July. Afternoon thunderstorms are a near-daily occurrence in the Elk Mountains.
August: The best overall month. Trails are snow-free, wildflowers transition from peak bloom to late-season varieties, and the weather is generally stable in the mornings. Afternoon storms remain a risk, so start early. The meadows take on a golden hue as grasses begin to cure.
September: Crowds disappear. The aspen groves along the lower trail turn gold, and the contrast of golden aspens against the dark spruce forest is striking. The weather is usually dry and cool, with daytime highs in the 50s and 60s and overnight lows near freezing at the lake. Snow can arrive at any point in September at these elevations, so check forecasts carefully.
October: The trail is accessible in early October during dry years, but snow is increasingly likely. Independence Pass (Highway 82) typically closes for winter in late October, which eliminates trailhead access from the Aspen side. This is a month for experienced hikers who are comfortable with winter conditions.
What to Bring
This is a bigger day than the trails around Maroon Lake or Vail (like Booth Falls). Pack accordingly.
- Water: 2 to 3 liters per person. There's no reliable water source above treeline, and the dry mountain air at 10,000 to 12,000 feet strips moisture from you faster than you realize. Grizzly Creek can supplement your supply if you carry a filter, but don't rely on it.
- Layers and wind protection: The lake sits in an exposed alpine basin at 12,300 feet. Even on a calm, sunny day, temperatures at the lake can be 20 to 25 degrees cooler than at the trailhead. Wind is common. Bring a wind shell, an insulating midlayer, and a warm hat. You'll want them at the lake even if the trailhead feels warm.
- Rain gear: Afternoon thunderstorms in the Elk Mountains build rapidly and can deliver rain, hail, and lightning with little warning. A lightweight rain jacket is essential.
- Sun protection: Above treeline, there's no shade. At 12,000 feet, UV radiation is roughly 40% stronger than at sea level. Sunscreen (SPF 50+), sunglasses, and a hat are non-negotiable.
- Food: This is a 4- to 6-hour hike for most people. Bring a real lunch and snacks, not just a granola bar.
- Trekking poles: Highly recommended for the steep sections, both on the way up and especially on the descent. The rocky terrain above treeline is uneven and can be hard on knees without poles.
- Dog supplies: If bringing your dog, carry water for them (they won't want to drink from the frigid lake) and watch for signs of altitude distress, particularly if your dog isn't acclimatized.
Practical Details
Parking: The Grizzly Lake Trailhead is a small pulloff on the south side of Highway 82, roughly 10 miles east of Aspen. It holds about 10 to 12 cars. No parking fee is required. The lot can fill on summer weekends by mid-morning, but it's rarely as crowded as the trailheads in the Maroon Bells corridor. There's limited overflow space along the highway shoulder, but be careful not to block traffic on this narrow mountain road.
Restrooms: None at the trailhead or on the trail. Plan accordingly.
Trail conditions: The lower trail is well-maintained and easy to follow. Above treeline, the trail becomes rougher, with rock and scree sections where the path is less distinct. Cairns mark the route in the upper basin. In early season, snow patches on the upper trail can obscure the path.
Cell service: Minimal to none. You may get a faint signal at the trailhead (proximity to Highway 82), but expect no coverage on the trail or at the lake.
Difficulty context: The moderate-hard rating accounts for the distance (8 miles), elevation gain (2,000 feet), and altitude (topping out above 12,000 feet). The trail itself is not technical. There's no scrambling, no exposure, and no route-finding required in normal conditions. The challenge is sustained effort at altitude. If you can comfortably hike 8 miles with 2,000 feet of gain at lower elevations, add about 30% more effort for the altitude factor.
Common Mistakes
Not starting early enough. Afternoon thunderstorms above treeline are genuinely dangerous. Lightning strikes on the exposed terrain above the lake have caused injuries. Plan to be at the lake by 11 AM and heading down by noon at the latest. That means starting the hike by 8 AM or earlier.
Ignoring altitude. The trailhead is at 10,300 feet and the lake is at 12,300 feet. If you flew into Aspen or Denver the same day, your body hasn't adjusted. Altitude sickness symptoms (headache, nausea, shortness of breath) can start as low as 8,000 feet for unacclimated visitors. Spend at least one night at elevation before attempting this hike.
Going too light on gear. The meadow at the trailhead can be sunny and 65 degrees while the lake is 40 degrees with a 25-mph wind. The difference between a great experience and a miserable one at Grizzly Lake is whether you brought a wind layer and a warm hat.
Missing the trailhead. The pulloff is small and easy to drive past, especially if you're focused on the winding mountain road. Watch for the sign on the south (right) side of the road if you're driving east from Aspen. If you reach the Independence ghost town, you've gone about 2 miles too far.
Getting There
From Aspen, take Highway 82 east toward Independence Pass. The trailhead is on the south side of the road, approximately 10 miles from Aspen (about 20 minutes of driving on the winding pass road). Look for a small parking area and trailhead sign on the right.
From Denver, take I-70 west to Copper Mountain (Exit 195), then Highway 91 south to Leadville, then Highway 82 west over Independence Pass to the trailhead. Total drive: approximately 160 miles, 3 to 3.5 hours. Note: Independence Pass is closed from late October through late May. During the closure, the only route to Aspen from the east is via Glenwood Springs on I-70, adding about an hour.
From Glenwood Springs, take Highway 82 south through Carbondale and Aspen, then continue east on Highway 82 toward the pass. Total drive: approximately 52 miles, 1 hour 15 minutes.
Grizzly Lake is the trail for hikers who want the real Colorado alpine experience without the infrastructure and crowds that come with the famous-name destinations. The wildflower meadows alone are worth the drive. The lake, sitting in its glacial amphitheater at 12,300 feet, is the bonus you earn for putting in the vertical. And on a Tuesday morning in September, you might have the whole basin to yourself. For an Aspen-area backcountry overnight with the ultimate payoff, Conundrum Hot Springs is a few drainages west in the same Elk Mountains terrain, though it requires a permit and two days. Mystic Island Lake near Silverthorne via the Eagles Nest Wilderness provides a comparable alpine lake experience in a completely different range and without the Independence Pass driving-season restrictions. From Denver, the 160-mile drive over Independence Pass is one of the most scenic approaches to any Colorado trailhead. The Leave No Trace principles matter especially in the Maroon Bells-Snowmass Wilderness where the high traffic at the Maroon Lake trailheads doesn't follow hikers to the quieter destinations like this one.