Select the location:
- Albion Lake (reservoir(s))
- Allens Lake (lake)
- Allenspark (populated place)
- Altona (populated place)
- Anderson Extension Ditch (canal)
- Autrey Reservoir (reservoir(s))
- Bark Ranch (populated place)
- Barker Meadow Reservoir (reservoir(s))
- Barker Reservoir (reservoir(s))
- Base Line Reservoir (reservoir(s))
- Bear Canyon Creek (stream)
- Bear Creek Ditch (canal)
- Beaver Creek (stream)
- Beaver Creek (stream)
- Beaver Lake (reservoir(s))
- Beaver Reservoir (reservoir(s))
- Bellmire Reservoir (reservoir(s))
- Betty Lake (lake)
- Blue Lake (lake)
- Bluebird Lake (reservoir(s))
- Bluebird Reservoir (reservoir(s))
- Bob Lake (lake)
- Bohn Lake (reservoir(s))
- Bonanza Mountain Estates (populated place)
- Bonus Ditch (canal)
- Boulder (city)
- Boulder and Left Hand Ditch (canal)
- Boulder and Weld County Ditch (canal)
- Boulder and Whiterock Ditch (canal)
- Boulder City Aqueduct (canal)
- Boulder Feeder Canal (canal)
- Boulder Reservoir (reservoir(s))
- Box Lake (lake)
- Brainard Lake (lake)
- Branith Reservoir Number 1 (reservoir(s))
- Buck Lake (lake)
- Burch Lake (reservoir(s))
- Burke Lake (reservoir(s))
- Button Rock Reservoir (reservoir(s))
- Cabin Creek (stream)
- Calkins Reservoir (reservoir(s))
- Campers Creek (stream)
- Canfield (city)
- Cardinal (city)
- Caribou Creek (stream)
- Castle Lake (lake)
- Castle Lakes (lake)
- Cave Creek (stream)
- Chasm Lake (lake)
- Chickadee Pond (lake)
- Clark Reservoir (reservoir(s))
- Clover Basin Ditch (canal)
- Clover Basin Reservoir (reservoir(s))
- Coal Creek (populated place)
- Coal Creek (stream)
- Coal Creek Ditch (canal)
- Coney Creek (stream)
- Cony Creek (stream)
- Cony Lake (lake)
- Coon Track Creek (stream)
- Copeland Lake (reservoir(s))
- Cottonwood Ditch Number 2 (canal)
- Cowdrey Reservoir (reservoir(s))
- Cowdrey Reservoir Number 2 (reservoir(s))
- Crisman (populated place)
- Crocker Ditch (canal)
- Crystal Lake (reservoir(s))
- Crystal Reservoir (reservoir(s))
- Culver Lateral (canal)
- Davidson Ditch (canal)
- Davis and Downing Ditch (canal)
- Davis Reservoir (reservoir(s))
- Davis Reservoir Number 1 (reservoir(s))
- Delonde Creek (stream)
- Devils Thumb Lake (lake)
- Diamond Lake (lake)
- Divide Reservoir (reservoir(s))
- Dodd Reservoir (reservoir(s))
- Dominion (city)
- Dry Creek (stream)
- Dry Creek (stream)
- Dry Creek (stream)
- Dry Creek Davidson Ditch (canal)
- Dry Creek Ditch Number 2 (canal)
- Dry Saint Vrain Creek (stream)
- Duck Lake (lake)
- Eagle Lake (lake)
- East Boulder Ditch (canal)
- Eggleston Number 1 Ditch (canal)
- Eggleston Reservoir Number 4 (reservoir(s))
- Eldora (populated place)
- Eldorado Springs (populated place)
- Elmwood Reservoir (reservoir(s))
- Empson Ditch (canal)
- Enterprise Ditch (canal)
- Equity Ditch (canal)
- Erie (populated place)
- Erie Lake (reservoir(s))
- Falcon Lake (lake)
- Farmers Ditch (canal)
- Fawn Creek (stream)
- Finch Lake (lake)
- Foothills Inlet Ditch (canal)
- Foothills Reservoir (reservoir(s))
- Fourmile Canyon Creek (stream)
- Fourmile Creek (stream)
- Fox Creek (stream)
- Frigid Lake (lake)
- Frozen Lake (lake)
- Giggey Lake (lake)
- Glacier Lake (reservoir(s))
- Glacier Lake (reservoir(s))
- Glen Reservoir (reservoir(s))
- Glendale (populated place)
- Gold Hill (populated place)
- Gold Lake (reservoir(s))
- Gold Lake Fill Ditch (canal)
- Gold Run (stream)
- Goodhue Ditch (canal)
- Goose Creek (stream)
- Goose Lake (reservoir(s))
- Gordon Creek (stream)
- Goss Private Ditch Number 1 (canal)
- Grand Island (city)
- Green Ditch (canal)
- Green Lake (lake)
- Green Lake Number 1 (reservoir(s))
- Green Lake Number 2 (reservoir(s))
- Green Lake Number 3 (reservoir(s))
- Green Lakes (reservoir(s))
- Gregory Creek (stream)
- Gresham (city)
- Gross Reservoir (reservoir(s))
- Gunbarrel (populated place)
- Haldi Ditch (canal)
- Harper Lake (lake)
- Hayden Lake (reservoir(s))
- Hecla Lake (reservoir(s))
- Hidden Brook (stream)
- Hidden Lake (populated place)
- Highland Ditch (canal)
- Highland Reservoir Number 2 (reservoir(s))
- Highline Lateral (canal)
- Hillcrest Reservoir (reservoir(s))
- Hinman Ditch (canal)
- Hodgson-Harris Reservoir (reservoir(s))
- Holland Ditch (canal)
- Horse Creek (stream)
- Horseshoe Creek (stream)
- Howard Ditch (canal)
- Hunters Creek (stream)
- Hutcheson Lakes (lake)
- Independent Reservoir (reservoir(s))
- Indigo Pond (lake)
- Ish Ditch (canal)
- Ish Reservoir (reservoir(s))
- Island Lake (reservoir(s))
- Isolation Lake (lake)
- James Creek (stream)
- James Ditch (canal)
- Jamestown (populated place)
- Jasper Creek (stream)
- Jasper Lake (lake)
- Jenny Lake (lake)
- Joder Reservoir (reservoir(s))
- Jones Donnelly Ditch (canal)
- Junco Lake (lake)
- Keplinger Lake (lake)
- King Lake (lake)
- Knoth Reservoir (reservoir(s))
- Kohler Reservoir (reservoir(s))
- Kossler Lake (reservoir(s))
- Lafayette (populated place)
- Lagerman Reservoir (reservoir(s))
- Lake Ditch (canal)
- Lake Dorothy (lake)
- Lake Eldora (lake)
- Lake Envy (lake)
- Lake Gibraltar (lake)
- Lake Isabelle (lake)
- Lake Isabelle (reservoir(s))
- Lake of Many Winds (lake)
- Lake of the Pines (lake)
- Lakewood Reservoir (reservoir(s))
- Lark Pond (lake)
- Lazy Acres (populated place)
- Left Hand Creek (stream)
- Left Hand Reservoir (reservoir(s))
- Left Hand Reservoir (reservoir(s))
- Left Hand Valley Reservoir (reservoir(s))
- Lefthand Park Reservoir (reservoir(s))
- Leggett and Hillcrest Reservoir (reservoir(s))
- Leggett Reservoir (reservoir(s))
- Leyner (populated place)
- Leyner Cottonwood Number 1 Ditch (canal)
- Liggett Ditch (canal)
- Lion Lake Number 1 (lake)
- Lion Lake Number 2 (lake)
- Little Dry Creek (stream)
- Long Lake (lake)
- Longmont (populated place)
- Longmont Reservoir (reservoir(s))
- Longmont Reservoir (reservoir(s))
- Longmont Supply Ditch (canal)
- Longs Peak Reservoir Number 1 (reservoir(s))
- Longs Peak Reservoir Number 2 (reservoir(s))
- Los Lagos Lakes (reservoir(s))
- Los Lagos Reservoirs (reservoir(s))
- Lost Lake (lake)
- Louisville (populated place)
- Louisville Reservoir (reservoir(s))
- Louisville Reservoir Number 1 (reservoir(s))
- Loukonen Brothers Reservoir (reservoir(s))
- Lower Boulder Ditch (canal)
- Lyons (populated place)
- Marfell Lakes (reservoir(s))
- Margaret Spurgeon Reservoir Number 1 (reservoir(s))
- Marshall Lake (reservoir(s))
- Marshallville Ditch (canal)
- Mathews Ditch (canal)
- Maxwell Lake (lake)
- Maxwell Reservoir (reservoir(s))
- McCall Lake (reservoir(s))
- McCaslin Lake (reservoir(s))
- McCaslin Reservoir (reservoir(s))
- McGinn Ditch (canal)
- McIntosh Lake (reservoir(s))
- McIntosh Reservoir (reservoir(s))
- Mesa Reservoir (reservoir(s))
- Middle Boulder Creek (stream)
- Middle Saint Vrain Creek (stream)
- Mill Diich (canal)
- Minnie Lake (lake)
- Mitchell Lake (lake)
- Morey (city)
- Mountain Meadows (populated place)
- Mountain View Lakes (reservoir(s))
- Mud Lake (lake)
- Nederland (populated place)
- New Dry Creek Ditch (canal)
- Niwot (populated place)
- Niwot Ditch (canal)
- North Beaver Creek (stream)
- North Boulder Creek (stream)
- North Boulder Farmers Ditch (canal)
- North Fork Middle Boulder Creek (stream)
- North Saint Vrain Creek (stream)
- Northwest Mutual Ditch (canal)
- Palmerton Ditch (canal)
- Panama Reservoir Number 1 (reservoir(s))
- Paragon Estates (populated place)
- Park Creek (stream)
- Peacock Pool (lake)
- Pear Reservoir (reservoir(s))
- Peck Ditch (canal)
- Peterson Lake (reservoir(s))
- Pine Brook Hill (populated place)
- Pinecliffe (city)
- Pipit Lake (lake)
- Pleasant View Ridge (city)
- Prince Lake Number One (reservoir(s))
- Prince Lake Number Two (reservoir(s))
- Rainbow Lakes (lake)
- Raymond (city)
- Red Deer Lake (lake)
- Red Rock Lake (lake)
- Ridglea Hills (city)
- Rock Creek (stream)
- Rock Creek (stream)
- Rock Lake (lake)
- Rough and Ready Ditch (canal)
- Saint Anton Highlands (populated place)
- Sale Lake (reservoir(s))
- Sandbeach Creek (stream)
- Sandbeach Lake (lake)
- Seven Hills (populated place)
- Seven Hills (populated place)
- Shearer Ditch (canal)
- Sherwood Creek (stream)
- Silver Creek (stream)
- Silver Lake (reservoir(s))
- Silver Lake Ditch (canal)
- Silver Spruce Reservoir Number 1 (reservoir(s))
- Sixmile Reservoir (reservoir(s))
- Skunk Creek (stream)
- Skyscraper Reservoir (reservoir(s))
- Smead Ditch (canal)
- Snowbank Lake (lake)
- South Boulder Canyon (canal)
- South Boulder Canyon Ditch (canal)
- South Boulder Foothills Ditch (canal)
- South Flat Ditch (canal)
- South Fork Middle Boulder Creek (stream)
- South Ledge Ditch (canal)
- Spring Brook (stream)
- Stapp Lakes (lake)
- Star Ditch (canal)
- Stearns Lake (reservoir(s))
- Steele Brothers Reservoir Number 1 (reservoir(s))
- Steele Brothers Reservoir Number 2 (reservoir(s))
- Steele Lakes (reservoir(s))
- Storm Lake (lake)
- Sugarloaf (populated place)
- Sullivan Ditch (canal)
- Sunset Lake (reservoir(s))
- Sunshine (populated place)
- Sunshine Lake (reservoir(s))
- Superior (populated place)
- Supply Ditch (canal)
- Swede Ditch (canal)
- Swede Lakes (reservoir(s))
- Table Mountain Ditch (canal)
- Tall Timber (populated place)
- Teller Lake (reservoir(s))
- Teller Lake Number 5 (reservoir(s))
- Terry Lake (reservoir(s))
- Terry Lateral (canal)
- The Slough (stream)
- Thomas Reservoir (reservoir(s))
- Thunder Lake (lake)
- Toll Gate Ditch (canal)
- Trevarton Reservoir (reservoir(s))
- Triple Lakes (reservoir(s))
- Tumbleson Lake (reservoir(s))
- Twin Lake (reservoir(s))
- Twin Lakes (lake)
- Upper Bear Creek Ditch (canal)
- Upper Coney Lake (lake)
- Upper Diamond Lake (lake)
- Upper Storm Lake (lake)
- Valmont (populated place)
- Valmont Reservoir (reservoir(s))
- Varsity Lake (reservoir(s))
- Viele Lake (reservoir(s))