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Onwentsia Club is an 18-hole private golf course in Lake Forest, Illinois.

Designed by James Foulis, C.B. Macdonald, Willie Watson, Dick Nugent, Brad Bartell, Tom Doak, Bruce Hepner. It plays 6,681 yards from the Black tees, rated 72.2/128 (checked 2026-08-14).

Create a free account to save Onwentsia Club to My Game, where every course you save is measured against the rest of its state on the figures it publishes.
18
holes
71
par
6,681
yards (tips)
128
slope (black)
The shape of the round · Black teespublished figures only
HOLE ORDER — BLACK TEES499399520418172367411426210545191450434192344376321441152435445364748493105113124134143154164174184PAROUT 3,422 YDSIN 3,294 YDSFIRST NINESECOND NINE
The published card in playing order, 18 holes with the two nines split — hole number under each bar, its par below that.

The course

designer
James Foulis, C.B. Macdonald, Willie Watson, Dick Nugent, Brad Bartell, Tom Doak, Bruce Hepner reported
access
private
address
300 North Green Bay Road, Lake Forest, IL, 60045
elevation
661 ft derived
opened
1895
turf
Bent Grass greens · Bent Grass fairways

42.24257, -87.84914 — open on OpenStreetMap →

The course, from above

This map shows all 18 holes. 35 mapped features sit close to more than one hole and are drawn with the nearer one.

268 traced features across 8 layers for Onwentsia Club, drawn over NAIP 2019 aerial imagery.

Use arrow keys to pan, plus and minus to zoom. Tab reaches the map controls.

268 traced features across 8 layers for Onwentsia Club, drawn over NAIP 2019 aerial imagery. The map itself needs JavaScript; the geometry is a plain GeoJSON file either way.

18
Holes
25
Fairways
90
Bunkers
1
Water
18
Greens
58
Tee pads
6,716yds
Black tees
545yds
Longest hole
172yds
Shortest hole

Imported from OpenStreetMap, edges unchecked · USDA NAIP 2019-08-09

Tees & ratings

Ratingsopen datachecked 2026-08-14

All 4 tee sets par, yardage, course rating, slope — the full table

Sorted by Yards, descending. 4 rows.

BlackM71668172.212834223294
BlueM71643270.912532753124
WhiteM715979contested592468.811930782846
GoldM71546071.612028432663

Every figure as published except Card yards (derived), which is summed from the card below and shown only where a published figure is contested; a blank cell elsewhere is one nobody publishes. Front 9 and Back 9 are summed from the per-hole yardages on the scorecard.

The White tees publish a yardage total the scorecard below does not add up to. Both figures are published and nothing we hold settles which one a round plays to, so the Yards column keeps the published figure, marked contested, and each tee's own yardage row from the card below is summed beside it, marked derived.

Scorecard — every published tee

Scorecardopen datachecked 2026-08-14

Hole 123456789101112131415161718 Total
Par 545434443534434444 71
Black 499399520418172367411426210545191450434192344376321441 6,681
Blue 478388487401159363397414188514180430425176331348300420 6,432
White 466364466385147337367371175459157395391160313326283362 5,979
Gold 458342419359121312322343167452141361372141285266239406 5,460
Handicap 913111175371516126418142108

Plan it in the Studio

Plan Onwentsia Club hole by hole, for your game.

Ask in plain words. The Studio draws each hole on the aerial photo, picks a club for each shot from your carries and the way you miss, and shows where a miss costs you strokes. Where a green was surveyed, it reads the slope too.

  • The approach, planned A Studio approach map on the aerial photo: a lob wedge aimed at the island green, its spread drawn as a dashed ring over the water, and the side it most often misses. Example from another course: hole 15, Resort tee, Stadium Course at TPC Scottsdale
  • The green, from LiDAR A Studio green view on the aerial photo: arrows for the slope a LiDAR survey measured, the area a cup could be cut, and the safer side to miss. Example from another course: hole 15, Stadium Course at TPC Scottsdale
  • Every shot, tee to green A Studio plan on the aerial photo of a desert par 4: the driver off the tee and a 7-iron into the green between the bunkers, each shot with its landing spread drawn as a dashed ring. Example from another course: hole 2, Resort tee, Stadium Course at TPC Scottsdale

Plan this course in the Studio

Pictures: Studio output for a sample golfer, drawn 2026-10-15. The Studio needs a free account. AI can make mistakes.

© OpenStreetMap contributors

Book nearby

Onwentsia Club states private access, so there is no tee time here to book. The nearest courses that state access you can book: Deerpath Golf Course (0.9 mi, public) · Lake Bluff Golf Course (3.0 mi, public) · Va Jo Wa Golf Club (4.7 mi, public)

Measured against comparable courses

How hard and how long this course plays against comparable courses — never how good it is.

FigureThis courseIn IllinoisNationwideAmong its peers
Longest6,681 yds=170th of 452=4,507th of 12,025=121st of 279 in the Chicago-Naperville-Elgin, IL-IN metro area · 1,527th of 2,954 private courses · =4,475th of 9,017 18-hole regulation courses
Toughest testslope 128=177th of 368=4,449th of 8,710=140th of 245 in the Chicago-Naperville-Elgin, IL-IN metro area · =1,754th of 2,300 private courses · =4,313th of 7,089 18-hole regulation courses
Hardest from the tipsrating 72.2=151st of 318=3,733rd of 7,615=116th of 215 in the Chicago-Naperville-Elgin, IL-IN metro area · =1,445th of 2,143 private courses · =3,694th of 7,034 18-hole regulation courses
Widest tee spread1,221 yds between tees244th of 427=7,216th of 11,523164th of 267 in the Chicago-Naperville-Elgin, IL-IN metro area · =2,041st of 2,885 private courses · =7,075th of 8,962 18-hole regulation courses
Oldestopened 18951st of 272=59th of 9,3681st of 178 in the Chicago-Naperville-Elgin, IL-IN metro area · =32nd of 2,418 private courses · =37th of 7,001 18-hole regulation courses
Highest above sea level661 ft derived =283rd of 479=6,060th of 12,437=189th of 291 in the Chicago-Naperville-Elgin, IL-IN metro area · =1,210th of 3,026 private courses · =4,303rd of 9,106 18-hole regulation courses

A published figure is compared only against the courses that publish it too, which is why the totals differ from row to row — a state's length field is the courses with a scorecard, not the courses in the state. Height above sea level is the exception: we derive it from a coordinate, so its field is very nearly every course we render. Ties share an ordinal and are marked =. How this is computed →

What's on this page

In progress4 of 6 built

4 of 6 parts of this course page are built, and we're filling in the rest.

  • Scorecard, built.Par and yardage for every hole, from 4 sets of tees.
  • Course rating and slope, built.Rated from 4 sets of tees.
  • Course map, built.All 18 greens drawn, with the fairways, bunkers and water, over aerial imagery.
  • Per-hole distances, built.Every hole is traced, so carries and distances to the front, middle and back of each green are measured along the line you actually play.
  • Green contours, not built yet.We haven't built the green contours for this course yet.
  • Course details, partly built.6 of 7 background details — we don't hold a phone number.

The site is in beta and the database is still being built, so expect gaps. Know something we don't? Help us fill it in — a link to where it's published is worth more than anything else you could send.

Sources

Gathered from the course's own site and public records — every figure on this page is traceable to who published it and when. Spot an error or a gap? Tell us.

Location and identity seeded from OpenStreetMap — © OpenStreetMap contributors, ODbL. Last checked 2026-08-14. Where each figure came from is stated beside it, above.

Compare this course →

Or go straight to a comparison: vs Deerpath Golf Course · vs Conway Farms Golf Club · vs Old Elm Club

Nearby courses

Deerpath Golf Course

0.9 mi · Lake Forest · public · 18 holes

Conway Farms Golf Club

2.2 mi · Lake Forest · private · 18 holes

Old Elm Club

2.2 mi · Highland Park · private · 18 holes

Knollwood Club Golf Course

2.8 mi · Lake Forest · private · 18 holes

Lake Bluff Golf Course

3.0 mi · Lake Bluff · public · 18 holes

Exmoor Country Club

3.9 mi · Highland Park · private · 18 holes

Shoreacres

4.0 mi · Lake Bluff · private · 18 holes

Va Jo Wa Golf Club

4.7 mi · Great Lakes · public · 18 holes

Straight-line distance from this course's coordinates, within 60 miles — not driving distance, and it crosses state lines where the nearest courses are over one.

Know something about this course? 8 fields we don't hold — or tell us something here is wrong