- 18Holes
- 70Par
- 11Rated tees
- 20Greens mapped
- 119Contours
- 5.7%Steepest slope
About Flatirons
Flatirons Golf Course is an 18-hole golf course playing to par 70 in Boulder, Colorado. Robert B. Harris designed it, and it opened in 1938. GolfCore has mapped 20 greens here with contour lines and fall-line arrows. The card below lists 11 rated tees with yardages for all 18 holes. GPS yardages and scoring are free in the GolfCore app.
Plan your visit
5706 Arapahoe Avenue, Boulder, CO
9649167736
How the greens break
GolfCore traced 20 greens at Flatirons from USGS 3DEP 1-meter lidar, with 119 elevation contours at a 3-inch interval. The steepest measured slope is 5.7 percent, and the largest rise across a single green is 2.9 ft.
In the app the same map sits under your ball on every green, with the fall line drawn to the hole and the wind modeled at your position. At clubs that run GolfCore, the pins the shop sets each morning show up there too.
Elevation: USGS 3D Elevation Program, U.S. Geological Survey, National Geospatial Program (public domain), processed by GolfCore.
The card
| Hole | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Out |
|---|---|---|---|---|---|---|---|---|---|---|
| Par | 4 | 4 | 4 | 3 | 4 | 4 | 5 | 3 | 4 | 35 |
| Yards | 377 | 401 | 394 | 180 | 387 | 348 | 539 | 134 | 324 | 3,084 |
| Hcp | 11 | 9 | 1 | 17 | 3 | 15 | 5 | 13 | 7 |
| Hole | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | In |
|---|---|---|---|---|---|---|---|---|---|---|
| Par | 4 | 3 | 4 | 4 | 5 | 3 | 4 | 4 | 4 | 35 |
| Yards | 336 | 144 | 339 | 370 | 462 | 154 | 394 | 353 | 384 | 2,936 |
| Hcp | 16 | 12 | 8 | 14 | 4 | 18 | 2 | 6 | 10 |
Total70 Yards6,020
| Hole | Par | Yards | Hcp |
|---|---|---|---|
| 1 | 4 | 377 | 11 |
| 2 | 4 | 401 | 9 |
| 3 | 4 | 394 | 1 |
| 4 | 3 | 180 | 17 |
| 5 | 4 | 387 | 3 |
| 6 | 4 | 348 | 15 |
| 7 | 5 | 539 | 5 |
| 8 | 3 | 134 | 13 |
| 9 | 4 | 324 | 7 |
| Out | 35 | 3,084 | |
| 10 | 4 | 336 | 16 |
| 11 | 3 | 144 | 12 |
| 12 | 4 | 339 | 8 |
| 13 | 4 | 370 | 14 |
| 14 | 5 | 462 | 4 |
| 15 | 3 | 154 | 18 |
| 16 | 4 | 394 | 2 |
| 17 | 4 | 353 | 6 |
| 18 | 4 | 384 | 10 |
| In | 35 | 2,936 | |
| Total | 70 | 6,020 |
Course rating and slope
| Tee | Yards | Par | Rating / Slope |
|---|---|---|---|
| Black | 6,824 | 70 | 72.2 / 131 78.9 / 142 (W) |
| Blue | 6,416 | 70 | 69.8 / 126 76.7 / 140 (W) |
| White | 6,020 | 70 | 67.6 / 124 74.0 / 138 (W) |
| White/Gold | 5,577 | 70 | 65.4 / 117 |
| Gold | 5,274 | 70 | 64.1 / 111 69.3 / 124 (W) |
| Green | 4,727 | 70 | 61.8 / 102 66.2 / 117 (W) |
Hole data is what GolfCore holds for the course's layout. Picking a tee shows that tee's own yardages, pars and stroke indexes where the club has rated them. Spot a wrong par, yardage or stroke index? Report it from Map Settings in the app, or send us a correction.
Course details
- Location
- Boulder, Colorado, United States
- Address
- 5706 Arapahoe Avenue, Boulder, CO
- Phone
- 9649167736
- Website
- flatironsgolf.com
- Architect
- Robert B. Harris
- Opened
- 1938
- Holes
- 18
- Par
- 70
- Tees on the card
- 11, 11 USGA-rated
- Greens mapped
- 20
- Elevation contours
- 119
- Contour interval
- 3-inch
- Largest green elevation span
- 2.9 ft
- Steepest measured slope
- 5.7%
- Course map
- Traced hole by hole
- Wind modeling
- Live wind grid, 16 directions
- Tree canopy
- 1-meter canopy height model
- Course data updated
- 2026-11-10
More courses nearby
Straight-line distance from Flatirons Golf Course.
-
Boulder Country ClubBoulder, Colorado4.1 mi straight-line
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-
Indian Peaks Golf CourseLafayette, Colorado5.1 mi straight-line
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-
Coal Creek Golf CourseLouisville, Colorado5.2 mi straight-line
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-
Lake Valley Golf ClubNiwot, Colorado6.1 mi straight-line
18 holes, par 70, scorecard, course map, green maps
- Gungarrel Green Archway
Lyons, Colorado4.2 mi straight-line
11 holes, par 43, scorecard, course map, green maps
- Haystack Mountain Golf Course
Niwot, Colorado6.4 mi straight-line
9 holes, par 32, scorecard, course map
Staff at Flatirons can claim this course by signing in with an email address at the club's own domain, then edit its address, phone, website and crest at no charge. Read how a club keeps its course right. The same system runs a club's tee sheet and caddie yard; read how caddie management on GolfCore works.