- 18Holes
- 71Par
- 10Rated tees
- 18Greens mapped
- 209Contours
- 7.3%Steepest slope
About Onwentsia Club
Onwentsia Club is an 18-hole golf course playing to par 71 in Lake Forest, Illinois. James Foulis, C.B. Macdonald designed it, and it opened in 1896. GolfCore has mapped 18 greens here with contour lines and fall-line arrows. The card below lists 10 rated tees with yardages for all 18 holes. GPS yardages and scoring are free in the GolfCore app.
Plan your visit
300 N Green Bay Rd, Lake Forest, IL
+1 847-234-0120
How the greens break
GolfCore traced 18 greens at Onwentsia Club from USGS 3DEP 1-meter lidar, with 209 elevation contours at a 3-inch interval. The steepest measured slope is 7.3 percent, and the largest rise across a single green is 4.2 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 | 5 | 4 | 5 | 4 | 3 | 4 | 4 | 4 | 3 | 36 |
| Yards | 466 | 364 | 466 | 385 | 147 | 337 | 367 | 371 | 175 | 3,078 |
| Hcp | 11 | 7 | 9 | 3 | 17 | 15 | 5 | 1 | 13 |
| Hole | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | In |
|---|---|---|---|---|---|---|---|---|---|---|
| Par | 5 | 3 | 4 | 4 | 3 | 4 | 4 | 4 | 4 | 35 |
| Yards | 459 | 157 | 395 | 391 | 160 | 313 | 326 | 283 | 362 | 2,846 |
| Hcp | 10 | 16 | 2 | 4 | 14 | 18 | 8 | 12 | 6 |
Total71 Yards5,924
| Hole | Par | Yards | Hcp |
|---|---|---|---|
| 1 | 5 | 466 | 11 |
| 2 | 4 | 364 | 7 |
| 3 | 5 | 466 | 9 |
| 4 | 4 | 385 | 3 |
| 5 | 3 | 147 | 17 |
| 6 | 4 | 337 | 15 |
| 7 | 4 | 367 | 5 |
| 8 | 4 | 371 | 1 |
| 9 | 3 | 175 | 13 |
| Out | 36 | 3,078 | |
| 10 | 5 | 459 | 10 |
| 11 | 3 | 157 | 16 |
| 12 | 4 | 395 | 2 |
| 13 | 4 | 391 | 4 |
| 14 | 3 | 160 | 14 |
| 15 | 4 | 313 | 18 |
| 16 | 4 | 326 | 8 |
| 17 | 4 | 283 | 12 |
| 18 | 4 | 362 | 6 |
| In | 35 | 2,846 | |
| Total | 71 | 5,924 |
Course rating and slope
| Tee | Yards | Par | Rating / Slope |
|---|---|---|---|
| Black | 6,716 | 71 | 72.3 / 135 78.7 / 139 (W) |
| Blue | 6,399 | 71 | 70.9 / 131 76.9 / 135 (W) |
| Blue/White | 6,186 | 71 | 70.3 / 127 |
| White | 5,924 | 71 | 69.0 / 126 74.3 / 130 (W) |
| White/Gold | 5,679 | 71 | 68.0 / 121 |
| Gold | 5,506 | 71 | 67.0 / 121 72.0 / 125 (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
- Lake Forest, Illinois, United States
- Address
- 300 N Green Bay Rd, Lake Forest, IL
- Phone
- +1 847-234-0120
- Website
- onwentsiaclub.com
- Architect
- James Foulis, C.B. Macdonald
- Opened
- 1896
- Holes
- 18
- Par
- 71
- Tees on the card
- 10, 10 USGA-rated
- Greens mapped
- 18
- Elevation contours
- 209
- Contour interval
- 3-inch
- Largest green elevation span
- 4.2 ft
- Steepest measured slope
- 7.3%
- 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 Onwentsia Club.
-
Deerpath Golf CourseLake Forest, Illinois0.8 mi straight-line
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- Old Elm Club
Highland Park, Illinois2.3 mi straight-line
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-
Conway Farms Golf ClubLake Forest, Illinois2.3 mi straight-line
18 holes, par 71, scorecard, course map, green maps
-
Lake Bluff Golf ClubLake Bluff, Illinois2.7 mi straight-line
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-
Knollwood ClubLake Forest, Illinois2.8 mi straight-line
18 holes, par 72, scorecard, course map, green maps
- Highland Park Country Club
Highland Park, Illinois4 mi straight-line
18 holes, par 71, scorecard
Staff at Onwentsia Club 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.