Eldora Historic District

Listed on the National Register of Historic Places in 1989.

From the record

“Eldora Historic District is a 30 acres (12 ha) historic district in Eldora, Colorado. Other names of the district and/or other historic names of places in the district are Happy Valley, Eldorado Camp, and 5BL758.”
Wikipedia article Eldora Historic District, CC BY-SA 4.0.

One of 92 National Register listings published here for Boulder County · listed in 1989 · category: District.

Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

The listing

Address. Roughly Eaton Pl., 6th, Pearl, and 4th Sts., Huron Ave., 6th St., Eldorado Ave., and 7th St., Klondyke Ave. & Tenth St., Eldora, 80466
When was it listed? October 1989
Category. district
Also known as. Metal Mining and Tourist Era Resources of Boulder County MPS; Metal Mining and Tourist Era Resources of Boulder County MPS
Census division. Bald Mountain
National Register reference number. 89000978 - the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.

Fires near this property

170 since 1992

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 170 fires within 5 miles of Eldora Historic District between 1992 and 2020, burning about 557 acres in total. 8 started naturally. 5 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

Reported cause	Fires
Missing data/not specified/undetermined	107
Recreation and ceremony	38
Natural	8
Equipment and vehicle use	5
Arson/incendiarism	5
Debris and open burning	4
Railroad operations and maintenance	1
Power generation/transmission/distribution	1
Smoking	1

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Date	Cause	Size	Reported by	Name on the report
9 September 2018	Missing data/not specified/undetermined	under an acre	Nederland Fire Protection District	UNKNOWN
9 September 2017	Natural	under an acre	Arapaho and Roosevelt National Forests and Pawnee National Grassland	JASPER LAKE
8 September 2017	Recreation and ceremony	under an acre	Arapaho and Roosevelt National Forests and Pawnee National Grassland	SITE 11 FIRE
8 September 2017	Equipment and vehicle use	under an acre	Nederland Fire Protection District	UNKNOWN
8 September 2017	Missing data/not specified/undetermined	under an acre	Nederland Fire Protection District	UNKNOWN
8 September 2016	Missing data/not specified/undetermined	under an acre	Nederland Fire Protection District	UNKNOWN
8 September 2015	Recreation and ceremony	under an acre	Arapaho and Roosevelt National Forests and Pawnee National Grassland	EAST PORTAL
8 September 2010	Missing data/not specified/undetermined	under an acre	Colorado State Forest Service-State Headquarters	not named

Every fire recorded in Boulder County

Mines and quarries near this property

10 of 255 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 255 workings within 5 miles of Eldora Historic District: 143 past producers, 85 occurrences, 23 producers, 2 unknowns. 24 still produce. What was taken out: Tungsten, Gold, Silver, Gold, Silver. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Site	Commodity	Status	Recorded
Anchor	Gold, Copper, Lead, Silver	Past Producer
Belcher	Silver, Gold, Lead, Copper	Past Producer	Galena, Sphalerite, Chalcopyrite, Pyrite
Big Moon	Gold, Silver, Lead	Past Producer
Blue Bird Mine	Copper, Gold, Zinc, Lead, Silver	Past Producer	Underground
Boulder Co. Mine	Silver, Gold, Tungsten, Lead	Occurrence	Vein
Boulder County Tunnel	Copper, Gold, Lead, Zinc	Occurrence	1870
Caribou Hill iron deposit	Iron, Titanium, Vanadium	Occurrence	Ilmenite, Magnetite, Titaniferous Magnetitite
Caribou Mine	Gold, Lead, Silver, Uranium, Copper, Zinc, Vanadium	Past Producer	1869
Caribou Mine (based on DMEA uranium report)	Zinc, Gold, Lead, Silver, Uranium	Past Producer	1869
Columbia	Gold, Copper, Zinc, Lead, Silver	Past Producer

Every working recorded in Boulder County

Map coverage status

No historic map-sheet match is published for this property yet. That does not mean no map exists. This record needs a coordinate-quality review before it can be joined to a sheet boundary. Browse the county's mapped places while that work is pending.

Listed places nearby

6 within 8 miles

Other National Register properties close enough to walk or drive between, ordered by distance from this one. Both positions come from the same geocoding pass that matched these properties to their map sheets.

Property	Distance	Listed
Gold Miner Hotel	0.1 miles	1997
Gold Miner Hotel (Boundary Increase)	0.1 miles	2007
Buchan Cabin	2.2 miles	2020
Denver, Boulder and Western Railway Historic District	5.6 miles	1980
Denver, Northwestern and Pacific Railway Historic District-Rollinsville & Middle Park Wagon Road (Boundary Increase)	6.4 miles	1997
Denver, Northwestern and Pacific Railway Historic District	6.4 miles	1980

Sources for this property

National Archives record	The nomination case file for reference 89000978 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Boulder County	All 92 listed properties in this county.

Provenance

Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.