Jewel - Grand Nine drawn from GolfCore's traced course vectors — fairways, tees, greens, bunkers and water, in the app's own colors. This is the same geometry the app maps a round on.

10Greens Mapped 125Elevation Contours 11.6%Steepest Slope 9Holes 33Par 6Rated Tees

Green contour map of Jewel - Grand Nine in Mackinac Island, Michigan — 125 elevation contours at a 3-inch interval with fall-line arrows, traced from 1-meter lidar — One of 10 mapped greens at Jewel - Grand Nine, drawn from GolfCore's contour data baked from USGS 3DEP 1-meter lidar, in the same colors the app uses. Elevation bands run cool-low to warm-high; white lines are contours at a 3-inch interval, and dark arrows point down the fall line.

The course, by the numbers

Location	Mackinac Island, Michigan, United States
Address	Algonquin Road
Phone	+18003347263
Website	grandhotel.com/activities/golf-on-the-jewel
Holes	9
Par	33
Tees on the card	6, 6 USGA-rated
Greens mapped	10
Elevation contours	125
Contour interval	3-inch
Largest green elevation span	4.2 ft
Steepest measured slope	11.6%
Course map	Traced hole by hole
Wind modeling	Live wind grid, 16 directions
Tree canopy	1-meter canopy height model
Course data updated	2026-08-07

The card

Tees

4,825 yds · Par 67 · Rating 65.0 · Slope 119

Hole	1	2	3	4	5	6	7	8	9	Out
Par	4	4	3	4	4	3	3	4	4	33
Yards	317	249	149	272	284	100	232	297	312	2,212
Hcp	7	17	6	16	14	18	1	10	9

Hole	10	11	12	13	14	15	16	17	18	In
Par	4	4	3	4	3	5	4	3	4	34
Yards	309	367	166	297	134	468	374	158	340	2,613
Hcp	13	3	8	12	15	2	4	11	5

Total67 Yards4,825

Hole	Par	Yards	Hcp
1	4	317	7
2	4	249	17
3	3	149	6
4	4	272	16
5	4	284	14
6	3	100	18
7	3	232	1
8	4	297	10
9	4	312	9
Out	33	2,212
10	4	309	13
11	4	367	3
12	3	166	8
13	4	297	12
14	3	134	15
15	5	468	2
16	4	374	4
17	3	158	11
18	4	340	5
In	34	2,613
Total	67	4,825

Course rating and slope

Tee	Yards	Par	Rating / Slope
Blue	5,273	67	67.3 / 126 72.4 / 137 (W)
White	4,825	67	65.0 / 119 69.9 / 129 (W)
Red	4,059	67	62.1 / 110 65.4 / 115 (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. Clubs correct their own data in the app.

What GolfCore has for Jewel - Grand Nine

GolfCore's library covers Jewel Golf Course - Grand Nine green by green: 10 putting surfaces traced with 125 elevation contours from USGS 3DEP 1-meter lidar. The steepest measured slope on these greens tilts at 11.6 percent — the difference between a putt that dies at the hole and one that runs four feet past.

In the app, players and caddies read the same data live on the course: contour bands with fall-line arrows, wind simulated at the player's position, and pin positions that clubs on GolfCore set each morning. Jewel Golf Course - Grand Nine is one of more than six thousand courses GolfCore has mapped green by green.

For clubs, the same system runs the tee sheet and the caddie yard — assignments off real tee times, SMS confirmations, and a caddie network that spans every club on the platform. Read how caddie management on GolfCore works.

Courses nearby

Staff at Jewel - Grand Nine can claim this course by signing in with an email address at the club's own domain. That sets the club up on GolfCore with you as an administrator.

GolfCore maps courses from public elevation data and is not affiliated with or endorsed by Jewel - Grand Nine. Represent this club? Request changes or removal through our contact page.