Arroyo Chico Hideaway

Arroyo Chico Hideaway is a 2.33-acre homesite in the Boulder foothills, forested and private at 6,500 feet yet twelve minutes from Pearl Street and CU: mountain quiet with a real city at the bottom of the hill. Three questions that often stall mountain lots are already answered: the Building Lot Determination is complete, the RFA report sets a 2,718 sf maximum, and a new survey is on record. Room for a guest house. No HOA, no dues.

Land

2.33 acres per the current survey (Boulder County assessor records show 2.55 acres), zoned F (Forestry), at roughly 6,500 feet. An open, forested parcel folded into the hillside, shaded by evergreens and broken by weathered outcrops of Boulder Creek Granodiorite, the rock that forms these foothills; soils run to sandy loam over decomposed granite. A couple of relatively level areas ease siting a home with less excavation. The parcel lies in Flood Zone X, outside the Special Flood Hazard Area. A small seasonal pond sits in a low spot, filling with snowmelt and spring runoff. Access is via the subdivision’s recorded platted road right-of-way along Arroyo Chico; buyer and agent to verify legal access and road-maintenance status. No HOA and no dues. Quiet and private without being remote or isolated.

Improvements

Essentially unimproved and ready to design. Zoning is F (Forestry), which permits a single-family dwelling. Boulder County’s Building Lot Determination is complete, and the letter is attached to this listing. The Residential Floor Area report sets the maximum at 2,718 sf.
No public water or sewer: the site will need a private well and an on-site septic system. The pre-1972 subdivision (1966 plat) may qualify the parcel for an exempt domestic well. Septic follows a soils and percolation evaluation, and septic permits on nearby parcels are on record. A driveway is subject to a Boulder County access permit, with approach and grade engineered at design. There is no reliable cell coverage at the property; Starlink is widely used across the foothills and supports Wi-Fi calling.
The property is served by the Four Mile Fire Protection District, which recently improved its ISO Public Protection Classification from Class 9 to Class 8B, a factor insurers weigh in the pricing and availability of homeowners’ coverage. New construction follows Boulder County’s wildfire code, including ignition-resistant materials and defensible space. A home built here starts with the mitigation that older foothills houses often have to retrofit.
The recorded Sierra Antigua Protective Covenants provide for architectural review, 35-foot setbacks, a 1.5-story maximum, natural exterior materials, and single-family use with one guest house (at least 400 sf, matching the main dwelling, and built after it). The 2,718 sf RFA maximum covers the main dwelling and guest house together.

Recreation

Outdoor amenities sit minutes away in every direction. Just down the canyon, Betasso Preserve offers miles of directional single-track for mountain biking, trail running, and hiking, with equestrian use as well. The Boulder Creek Path runs the canyon below for a car-free ride into town. Boulder Canyon’s granite puts rock climbing close at hand, and Boulder Creek holds trout for the fly rod. Cyclists have road, gravel, and mountain terrain within easy riding distance from the property, and up the road sits the historic mining town of Gold Hill and its storied inn. For the high country, the Peak to Peak, the Indian Peaks Wilderness, and Eldora’s lifts are a short drive west.

Region & Climate

This is Colorado’s Front Range foothills, the transition zone where the plains rise into the Southern Rockies, at roughly 6,500 feet. The setting is montane forest, ponderosa pine and Douglas fir over ancient granodiorite, wooded and quiet yet a short descent from the full services of Boulder. Four distinct seasons, low humidity, and abundant sun; summers run cooler than Denver and the lowlands, and winters bring intermittent mountain snow between clear, bright stretches.

History

Fourmile Canyon is where Colorado’s gold story effectively began: an 1859 strike on Fourmile Creek led prospectors to Gold Hill and touched off the Boulder County rush. The canyon’s old camps (Salina, Crisman, and Wall Street) still stand, and from roughly 1898 until 1919 the narrow-gauge Switzerland Trail railroad climbed these grades toward Eldora and Ward. The bedrock underfoot, Boulder Creek Granodiorite, is among the oldest rock in the county. Real history, held close to a modern college town. And a new chapter arrives in January 2027, when the Sundance Film Festival makes Boulder its home, anchored on the Pearl Street mall twelve minutes down the canyon.

Location

About twelve minutes from downtown Boulder: west on Boulder Canyon Drive, up Fourmile Canyon, then right on Arroyo Chico. Close enough to commute, run errands, or make a dinner reservation without planning your day around the drive, and far enough up to trade traffic for quiet. Downtown Boulder, CU, and Pearl Street are minutes out; Nederland and the Peak to Peak are just west; Denver and DIA are straightforward drives. Boulder Valley schools.
Please note. Arroyo Chico is a county road for part of its length. Buyer to verify legal access and maintenance of the segment serving the property; utility availability; well permit type with the Colorado Division of Water Resources; septic feasibility; county approval of any accessory or guest dwelling; and, with no active association, how the covenants’ architectural review provision operates today. ISO classification is assigned parcel by parcel, generally by road distance to a responding station, so confirm classification and coverage with an insurer. The survey, Building Lot Determination, RFA report, recorded covenants, and maps are available for review.
Listed acreage of 2.33 reflects the new survey; Boulder County assessor records show 2.55 acres.
All figures, approvals, and site characteristics above are provided for general information, are not warranted, and remain subject to independent verification. Buyer should rely on Buyer’s own due diligence and professional advisors, not on any statement by Broker or Seller.