Starting a bit more than a century ago, a number of alpine lakes in what is now Rocky Mountain National Park and Indian Peaks Wilderness had their capacity enlarged by building dams. With the failure of the Lawn Lake dam in 1982, the reservoirs in the Park have all been removed and the lakes returned to their previous state. Natural processes are quite slow at high altitude, and most of these lakes have a noticeable “bathtub ring” where one can see the difference between the natural level of the lake and the higher level when it was dammed.
In Indian Peaks, though, some of these reservoirs and dams still exist, and at least one I’ve been to, Jasper Lake, is still operating.
Skyscraper Reservoir is of a more recent vintage than those decommissioned reservoirs in the Park. Those were constructed between the 1890s and 1920s. Skyscraper Reservoir wasn’t built until the 1940s.
Everett Long, the second-generation owner of Long’s Gardens in Boulder, decided that he needed a better water source to keep his seed and garden business going and growing. He was an avid mountaineer (he climbed Longs Peak 93 times!) with intimate knowledge of the area that is now the Park and the IPW.
Long knew the drainages and many lakes of the high country well. He had graduated from CU in 1934 and had studied water law. Today, land use policies and water law are highly complex, but back in Ev’s day, it was still possible for an individual (or small company) to find a mountain lake that was suitable for a dam, build it, and access the stored water. So that’s what he set out to do.
Everett and his wife Anne were newlyweds and honeymooned at a cabin in the Fourth of July area. They spent their days hiking the high country, ultimately settling on what was then called Upper Woodland Lake as the right place. In 1940, preparations were made to transform Upper Woodland Lake into Skyscraper Reservoir. Plans for the dam were submitted to the Colorado State Engineer that summer and approved in September 1940.
That same fall, equipment was hauled to the lake so that work could begin the next year. The following summer, Upper Woodland Lake was drained and excavation for the dam’s foundation was completed. In 1942, construction of the dam began, but work had to be put on hold for the next three years while Long served as a civilian flight instructor during WWII. After the war, work on the reservoir resumed. While horses were used early in the project to transport equipment, dynamite, and concrete, they soon purchased a 1947 Dodge Power Wagon and an M29 Weasel (a tracked vehicle developed during the war for use on snow and difficult terrain) that served until the project was completed.
Today, a road and bridges still survive a bit further than the spur trail to Lost Lake, there was never a proper road built the last few miles to the dam. The Dodge could deal with the rudimentary roads as far as they went, but it was necessary to use the truck’s winch to pull itself up the final three miles to the construction site.
The working season above 11,000 feet is short, so it took five more summers to complete construction. Finally, in 1951, the water level was raised 15 ft. and the reservoir was filled to capacity. In 1967, Skyscraper Reservoir was sold to the City of Boulder.
Tuesday, August 27
I arrived at the trailhead at about 7:30 and was able to park very close to the shuttle bus stop. Usually, I have to park a fair distance down the road.
I’m not a big fan of the trail from the trailhead to the spur trail to Lost Lake. It’s mostly a four-wheel-drive road, wide, with a gentle grade. But there are a lot of large, loose rocks and the footing doesn’t allow for a quick pace.
There are two trails that parallel Jasper Creek, one on each side. I took the one on the west. As you near the Woodland Lake junction, the trail gets a bit thready. I’ve now done two round trips along this section, so four times through, and don’t think I’ve gone exactly the same way twice.
About a quarter mile above the Woodland Creek junction, the trail crosses a stream. The bridge here is broken. People have piled a bunch of branches across it. Last year I came this way but the water was running over all of it so I turned around and went to Lost Lake. Today, the water was low enough that crossing wasn’t a problem. None of the trail is very steep, but the the first mile after the junction, with the broken bridge in the middle, is the steepest.
The peaks at the head of the valley are relatively gently sloped: there are no towering crags, no steep rock faces. Woodland Lake is your basic forest lake. The hike through the forest is pleasant, but dramatic scenery is not on offer here. But the dam is of interest. Most of the small alpine reservoirs in the area were remediated in the wake of the Lawn Lake flood.
As is typical at the Divide, the wind was on the unpleasant side. I certainly didn’t want to sit near the dam. I watched the wind on the water for a few minutes then set off for the opposite side of the lake, in the lee of the slope.
It’s not clear to me if this lake is still used as a reservoir. The dam still stands. That is, there is no sign of any attempted removal of the structure. But the water level is right about at the base of the dam, so the lake today is about its original size. Based on my two visits to the broken bridge, I’d say the water flow was normal seasonal flow – that is, uncontrolled. On the other hand, there isn’t much growth in the bathtub ring compared to reservoirs that were reclaimed in the 80s. Some grasses, but no shrubs or tree saplings.
| Segment | Distance | Elev Change | Time | Speed |
|---|---|---|---|---|
| Trailhead to Devil’s Thumb Bypass | 1.3 mi | 342’/mi | 0:33 | 2.4 mph |
| Devil’s Thumb Bypass to Devil’s Thumb | 0.5 mi | 400’/mi | 0:12 | 2.3 mph |
| Devil’s Thumb to Woodland Lake Jct | 1.0 mi | 130’/mi | 0:25 | 2.3 mph |
| Woodland Lake Jct to Skyscraper Reservoir | 2.4 mi | 562’/mi | 1:41 | 1.4 mph |
| Trailhead to Skyscraper Reservoir | 5.2 mi | 430’/mi | 2:51 | 1.8 mph |
