Siena Dam

Siena Dam: crowds and conditions

Typical pattern: usually quiet; mostly local visitors. Been there recently? Post today’s status and it shows here for the next traveller.

Status options for this lake: Full / gates open · Low water level · Entry closed.

Best time to visit Siena Dam

Season: August to December when reservoirs are full and gates may open.

Crowd: Usually quiet; mostly local visitors.

Typical week: Mon quiet · Tue quiet · Wed quiet · Thu quiet · Fri light · Sat light · Sun light.

How to reach Siena Dam — distance from nearby cities

Coordinates: 39.98113, -105.03201. Road distances are estimates; the road-trip planner uses real routes and adds stops worth the detour.

Places to visit near Siena Dam

• Marfell Lakes · lake · Boulder · ~7 km · Must-see
• Butterfly Pavilion · sanctuary · Jefferson · ~14 km · Must-see
• Walden Ponds Wildlife Habitat · sanctuary · Boulder · ~19 km · Must-see
• Hackberry Park · park · Jefferson · ~21 km · Must-see
• Rocky Flats National Wildlife Refuge · sanctuary · Jefferson · ~22 km · Must-see
• Hills of Standley Lake Park · lake · Jefferson · ~22 km · Must-see
• Longmont Museum and Culture Center · museum · Boulder · ~24 km · Must-see
• Boulder Reservoir · lake · Boulder · ~24 km · Must-see
• Museum of Natural History - Henderson Building · museum · Boulder · ~26 km · Must-see
• ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​St. Vrain State Park · park · Weld · ~26 km · Must-see
• Andrews Arboretum · park · Boulder · ~26 km · Must-see
• Boulder Museum of Contemporary Art · museum · Boulder · ~27 km · Must-see
• Chautauqua Park · park · Boulder · ~27 km · Must-see
• Pine Street Church · church · Boulder · ~27 km · Must-see
• The Flatirons · viewpoint · Boulder · ~28 km · Must-see
• Lake Rhoda · lake · Jefferson · ~28 km · Must-see
• Lakeside Amusement Park · park · Jefferson · ~28 km · Must-see
• Bear Peak · viewpoint · Boulder · ~28 km · Must-see

See everything within a day’s drive of Siena Dam

Other lakes, dams & reservoirs near Siena Dam

• Marfell Lakes · lake · Boulder · ~7 km · Must-see
• Hills of Standley Lake Park · lake · Jefferson · ~22 km · Must-see
• Boulder Reservoir · lake · Boulder · ~24 km · Must-see
• Lake Rhoda · lake · Jefferson · ~28 km · Must-see
• Sloan's Lake · lake · Denver · ~32 km · Must-see
• Gross Reservoir · lake · Boulder · ~36 km · Must-see
• Barker Reservoir · lake · Boulder · ~49 km · Must-see
• Marston Lake · lake · Denver · ~49 km · Must-see
• Cherry Creek Dam · lake · Arapahoe · ~50 km · Must-see
• Stapp Lakes · lake · Boulder · ~58 km · Must-see

All lakes, dams & reservoirs in Colorado

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