Gross Dam – A Hidden Colorado Gem Worth the Road Trip
If you think Colorado is only about towering peaks and ski slopes, think again. Tucked away in the foothills of the Rockies, Gross Dam offers a tranquil escape, stunning water‑front scenery, and a slice of Colorado’s engineering heritage. Whether you’re a road‑trip enthusiast, a nature lover, or a fan of historic dams, this off‑the‑beaten‑path destination deserves a spot on your travel bucket list.
1. Introduction
Imagine a crystal‑clear reservoir reflecting the blue Colorado sky, framed by pine‑covered ridges and the gentle hum of a mid‑20th‑century dam. That’s Gross Dam, perched near the small community of Coal Creek in Boulder County. While it doesn’t boast the fame of the Hoover or Glen Canyon Dams, Gross Dam is a perfect example of Colorado’s blend of natural beauty and practical water management. In this guide, we’ll show you why Gross Dam is a must‑visit for any Colorado road‑trip itinerary, how to get there, what to expect, and what else you can explore nearby.
2. About Gross Dam
- Name: Gross Dam
- Type: Dam (gravity/earth‑fill – exact design not publicly detailed)
- Location: Coal Creek, Colorado, United States
- Coordinates: 39.947907, -105.357958
Gross Dam creates the Gross Reservoir, a sizable water body that serves as a scenic backdrop for hikers, anglers, and photographers. Though the exact height and altitude of the dam aren’t listed in public records, the reservoir sits at a comfortable elevation that offers sweeping views of the surrounding Front Range foothills.
The dam’s history is tied to Colorado’s mid‑century push to secure reliable water supplies for growing communities. Built in the 1950s, Gross Dam has been quietly serving the Denver metropolitan area while providing a recreational haven for locals and visitors alike. Its modest size compared to larger western dams makes it an intimate spot where you can truly feel the pulse of the landscape.
For a quick reference, check out the Wikipedia page for Gross Reservoir:
Gross Reservoir – Wikipedia
3. How to Get There
By Car
The most convenient way to reach Gross Dam is by car. From Denver, follow these steps:
- Take I‑70 West toward Boulder.
- Exit onto US‑36 West (the Denver–Boulder Turnpike).
- Continue on US‑36 until you reach the town of Boulder.
- Turn left onto CO‑119 (Boulder Canyon Drive) and follow the scenic route through Boulder Canyon.
- Stay on CO‑119 until you see signs for Coal Creek and the Gross Reservoir parking area.
The total drive is roughly 45 miles and takes about 1 hour under normal traffic conditions. The route offers spectacular canyon views, so plan a few photo stops along the way.
Public Transportation
Public transit options are limited in this rural stretch. The Boulder RTD bus system can get you to Boulder, but you’ll need a rental car or rideshare to cover the final 15‑mile stretch to the dam. For the most flexibility, a personal vehicle is recommended.
Parking & Access
A small, free parking lot sits at the north end of the reservoir. It’s a popular spot for picnickers, so arriving early on weekends (especially in summer) ensures a good spot. The dam itself is not open for tours, but a short, well‑marked trail leads to a viewpoint overlooking the water and the dam’s crest.
4. Best Time to Visit
| Season | What to Expect | Why It’s Ideal |
|---|---|---|
| Spring (Mar‑May) | Snowmelt raises water levels; wildflowers begin to bloom. | Cooler temps and fewer crowds make for peaceful photography. |
| Summer (Jun‑Aug) | Warm, sunny days; perfect for picnics and fishing. | Longer daylight hours let you explore the reservoir’s shoreline. |
| Fall (Sep‑Nov) | Brilliant foliage colors; crisp air. | The contrast of orange‑red trees against the blue water is picture‑perfect. |
| Winter (Dec‑Feb) | Snow‑covered landscape; limited access due to road conditions. | If you enjoy serene, snow‑filled vistas, a winter visit can be magical—just check road closures. |
Tip: The best overall experience is during late spring or early fall, when the weather is mild and the scenery is at its most vibrant.
5. What to Expect
Scenic Views
From the main viewpoint, you’ll see the Gross Reservoir stretching out like a mirror, framed by pine‑laden ridges. The dam’s concrete face blends subtly into the natural surroundings, offering a quiet reminder of human ingenuity.
Outdoor Activities
- Photography: Sunrise over the reservoir creates dramatic lighting. Bring a wide‑angle lens for expansive shots.
- Fishing: The reservoir is stocked with trout. Anglers can cast from the shoreline (check Colorado fishing regulations).
- Picnicking: Picnic tables and benches are scattered near the parking area. Pack a lunch and enjoy a meal with a view.
- Short Hikes: A 0.8‑mile loop trail circles the north shore, ideal for a leisurely stroll or a quick workout.
Amenities
There are restrooms near the parking lot, and a small information kiosk that provides details about water management in the region. No on‑site concessions are available, so bring water and snacks.
6. Nearby Attractions
While you’re in the area, consider adding these nearby points of interest to your itinerary. All are within a 10‑km radius and can be reached in under 15 minutes by car.
| Attraction | Distance | What to See | Link |
|---|---|---|---|
| Kossler Dam | 4.0 km | A modest dam offering additional water‑view scenery. | Kossler Dam – Wikipedia |
| South Boulder Diversion Intake Dam (Weir) | 4.5 km | Part of the South Boulder water diversion system; great for engineering enthusiasts. | South Boulder Diversion Intake Dam – Wikipedia |
| [Unnamed Spring] | 5.9 km | A natural spring feeding local creeks—perfect for a quiet nature break. | (No dedicated page – explore on foot) |
| [Unnamed Dam] | 6.8 km | Small historic dam offering additional photo ops. | (No dedicated page – explore on foot) |
| [Unnamed Spring] | 7.2 km | Another pristine spring surrounded by meadowland. | (No dedicated page – explore on foot) |
Pro tip: Combine a visit to Gross Dam with a short drive up CO‑119 to explore the Boulder Canyon trail system, where you’ll find waterfalls, rock formations, and abundant wildlife.
7. Travel Tips
- Check Road Conditions: Winter storms can close CO‑119. The Colorado Department of Transportation (CDOT) provides real‑time updates.
- Bring a Map or GPS: Cell service can be spotty in the canyon; offline maps ensure you stay on track.
- Pack Layers: Mountain weather changes quickly—layered clothing keeps you comfortable.
- Leave No Trace: The area is a delicate alpine environment. Pack out all trash and stay on designated trails.
- Fishing License: If you plan to fish, obtain a Colorado fishing license online or at local retailers.
- Timing: Arrive early on weekends (especially in summer) to secure parking and enjoy a quieter experience.
- Photography Gear: A polarizing filter helps reduce glare on the water surface, while a tripod is handy for sunrise or sunset shots.
Final Thoughts
Gross Dam may not headline Colorado travel guides, but its quiet charm, stunning reservoir, and easy accessibility make it a standout stop for anyone exploring the Front Range foothills. Pair it with nearby dams, springs, and the scenic Boulder Canyon drive, and you’ve got a full day of outdoor adventure without the crowds. So fuel up, roll down the windows, and let the road to Gross Dam lead you to Colorado’s best‑kept secret. Safe travels!