1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back
Boulder Open Space and Mountain Parks · 3.87 mi out and back · about 2 hr 5 min
- Highest
- 7,151 ft
- Lowest
- 5,690 ft
- Route type
- One way or out and back
- Surface
- Not mapped
- Offline
Overview
1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back is mapped as a trail of 3.87 mi in Boulder Open Space and Mountain Parks. It is not a loop: you walk it one way or out and back.
It runs between 5,690 ft and 7,151 ft above sea level, a difference of 1,461 ft.
Mapped along or near the trail: 3 viewpoints, 1 climbing area.
Estimates
- Estimated time 2 hr 5 min one way by Naismith's rule, which assumes steady walking and adds time for climbing. Real time varies.
Before you rely on this
- Water points are mapped nearby, but mapped is not tested or guaranteed: treat any water and carry your own.
- Check the land manager for closures, seasonal rules and permits before you go; none of that is verified here.
Elevation
Hover, tap, or use the arrow keys on the chart to read a point; it is shown on the map too.
Steep sections (7)
- 131 ft to 0.38 mi: about 22.1% downhill (from the elevation model, so rough)
- 0.41 mi to 1.00 mi: about 20.9% downhill (from the elevation model, so rough)
- 1.03 mi to 1.22 mi: about 15.6% downhill (from the elevation model, so rough)
- 1.38 mi to 1.48 mi: about 13.5% downhill (from the elevation model, so rough)
- 2.41 mi to 2.51 mi: about 13.5% uphill (from the elevation model, so rough)
- 2.62 mi to 2.85 mi: about 15% uphill (from the elevation model, so rough)
- 2.89 mi to 3.83 mi: about 21.4% uphill (from the elevation model, so rough)
Before you go
- Parking
- No parking is mapped near the start. not verified
- Trailhead and directions
- Start at 39.99017, -105.29487. Directions to the start ↗
- Permits and fees
- We have no verified permit or fee details. Official pages: Boulder Open Space and Mountain Parks ↗, Boulder County ↗ (we have not recorded when these were last checked). not verified
- Dogs
- No dog rule is tagged. not verified
- Water
- 1 drinking-water point mapped nearby. Mapped is not tested: treat water and carry your own. mapped by OpenStreetMap contributors
- Toilets and facilities
- None mapped. not verified
- Accessibility, bikes and horses
- No access details are tagged. not verified
- Seasonal rules, closures and hazards
- Not verified here. Check the land manager (Boulder Open Space and Mountain Parks ↗) and read the hiker condition reports below. No report does not mean the trail is open or safe. not verified
Weather at the trailhead
Today: sunrise 7:14 AM, sunset 6:17 PM (computed from the trailhead location).
Forecast for the trailhead area from the U.S. National Weather Service, updated Oct 18, 12:46 AM. Mountain weather changes fast and can differ a lot by elevation: check the official forecast for your route before you go.
Recent conditions
Reports come from Arête members, not from land managers. They show when something was seen, not whether it is still true. Check official sources before you go.
No condition reports in the last 30 days. Conditions are unknown, not necessarily good.
Reviews
No reviews yet, so there is no rating to show. We never invent ratings. Sign in to be the first to review this trail.
Photos and places from hikers
Added by community members and checked by our team before they appear. Photos have their location data removed. These are not official information.
No approved photos or places yet.
Along the way
Sights
Water
- Drinking water (mapped)1.55 mi from startUnnamed OSM ↗
Mapped by OpenStreetMap contributors. Not tested or guaranteed: springs can dry up and water must be treated. Carry enough water.
Points come from OpenStreetMap contributors and can be missing, moved or out of date. How we label data.
Nearby trails
- 1st/2nd Flatiron0.80 mi · 0 ft gain · 0.0 mi away
- Bluebell Mesa Trail + Bluebell Road Trail + Royal Arch Trail + 2 more trails loop1.43 mi loop · 424 ft gain · 0.5 mi away
- Bluebell Mesa Trail + Chautauqua Trail + Bluebell Hiking Trail + 1 more trails loop1.87 mi loop · 485 ft gain · 0.5 mi away
- Bluebell Mesa Trail + Chautauqua Trail + Bluebell Hiking Trail + 3 more trails loop2.40 mi loop · 575 ft gain · 0.5 mi away
Arête-built route from mapped trails
Assembled by Arête from mapped trail segments. Not an official or recommended route.
- 1st/2nd Flatiron · 96 ft (part of the mapped trail)
- 1st/2nd Flatiron · 0.60 mi (part of the mapped trail)
- 1st/2nd Flatiron · 0.17 mi (part of the mapped trail)
- Flatirons Loop Trail · 482 ft (part of the mapped trail)
- Chautauqua Trail · 0.13 mi (part of the mapped trail) · walked back
- Chautauqua Trail · 0.19 mi (part of the mapped trail) · walked back
- Chautauqua Trail · 0.33 mi (part of the mapped trail) · walked back
- Bluebell Hiking Trail · 0.11 mi (part of the mapped trail)
- 6th Street Connector Trail · 0.28 mi · walked back
- 6th Street Connector Trail · 0.28 mi
- Bluebell Hiking Trail · 0.11 mi (part of the mapped trail) · walked back
- Chautauqua Trail · 0.33 mi (part of the mapped trail)
- Chautauqua Trail · 0.19 mi (part of the mapped trail)
- Chautauqua Trail · 0.13 mi (part of the mapped trail)
- Flatirons Loop Trail · 482 ft (part of the mapped trail) · walked back
- 1st/2nd Flatiron · 0.17 mi (part of the mapped trail) · walked back
- 1st/2nd Flatiron · 0.60 mi (part of the mapped trail) · walked back
- 1st/2nd Flatiron · 96 ft (part of the mapped trail) · walked back
Starts at a derived trailhead (1 mapped trail start within 150 m), no mapped parking within 400 m; the route starts at the nearest mapped trail junction, 0 m from that point. Built by Arête from the graph of mapped trail segments (OpenStreetMap). Segments join where their ends are within 12 m of each other or one ends on another's line (a T-junction). A loop returns to its start without repeating a trail section; an out-and-back goes to a mapped trail end and returns the same way, so its length counts both directions. Names come only from the mapped trails it uses. Length is measured on the joined line; elevation is computed from USGS 3DEP. Not an official or recommended route.
Data, sources and how the numbers are made
| Length | 3.87 micomputed |
|---|---|
| Route type | Out and backcomputed |
| Surface | Unknownunknown |
| Difficulty | Unknownunknown |
| Elevation gain (as drawn) | 1,565 ftcomputed |
| Elevation loss (as drawn) | 1,570 ftcomputed |
| Estimated duration | about 2 hr 5 min one way as drawn (Naismith's rule)computed |
| Official verification | Not verified by an official sourceunknown |
Length is measured from the route geometry in the source data, so it can differ from signed or official distances. Gain and loss describe the direction the line is drawn; the route view above shows the other direction and out and back. Elevation is computed from USGS 3DEP 1/3 arc-second DEM (public domain), sampled about every 10 m and smoothed.
© OpenStreetMap contributors (ODbL). Route assembled by Arête from mapped trail segments.. Arête-built routes from mapped trails. Licence: ODbL 1.0 (derived from OpenStreetMap).
Frequently asked questions
How long is 1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back?
1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back in Boulder Open Space and Mountain Parks is 3.87 mi long, measured from its route geometry in OpenStreetMap data. Signed or official distances can differ.
How much elevation does 1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back gain?
Walking from the start to the end as drawn, it climbs about 1,565 ft and descends about 1,570 ft, between 5,690 ft and 7,151 ft. These are computed from the USGS 3DEP elevation model and can differ from other apps; the other direction swaps climbing and descending.
How hard is 1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back?
Difficulty is unknown: no source we use rates this trail, and we don't guess. Use the length and elevation gain to judge it for yourself.
How long does 1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back take?
About 2 hr 5 min one way for a fit hiker, by Naismith's rule from the length and climb. It is an estimate: allow more for rest, photos, heat, altitude and weather.
Where does 1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back start?
The route starts near 39.9902, -105.2949 (Boulder Open Space and Mountain Parks, Boulder County). Use the Directions button to open it in your maps app.
Are dogs allowed on 1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back?
Not tagged in OpenStreetMap, so it is unknown. Check posted signs and the land manager's website.
Is there water, parking or a toilet at 1st/2nd Flatiron + Flatirons Loop Trail + Chautauqua Trail + 2 more trails out and back?
Mapped in OpenStreetMap near this trail: 1 water point, 0 parking areas, 0 toilets. Mapped water is not tested or guaranteed: carry your own. Fees and permits are not included here; check the official page.
Trail data can be wrong or out of date, and Arête is not an emergency service. Check official sources, weather and closures before you go.