Lake Roslyn, also known as Ruby Lake, is a private water resource nestled in Jackson County, Colorado. Built in 1938, this earth dam stands at 35 feet tall and serves multiple purposes including irrigation and recreation. With a storage capacity of 425 acre-feet, the lake covers a surface area of 27 acres and is fed by Howdy Creek. Its significant hazard potential is managed through regular inspections, with the latest assessment in 2018 deeming its condition satisfactory.

Owned by a private entity, Lake Roslyn offers a serene escape for water and climate enthusiasts seeking outdoor activities. Its uncontrolled spillway and ample storage make it a vital resource for the region, with a maximum discharge capacity of 510 cubic feet per second. The dam's structural integrity is upheld through state-regulated inspections and enforcement, ensuring the safety of its surrounding community and downstream areas along Howdy Creek.

Visitors to Lake Roslyn can enjoy the scenic views and recreational opportunities provided by its tranquil waters. From fishing and boating to picnicking along its shores, this picturesque reservoir offers a peaceful retreat in the heart of Colorado's natural beauty. With a moderate risk assessment rating and a history dating back to the early 20th century, Lake Roslyn remains a beloved destination for nature lovers and water enthusiasts alike.