The Fortress 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.

20Greens Mapped 255Elevation Contours 9.1%Steepest Slope 18Holes 72Par 8Rated Tees

Green contour map of The Fortress in Frankenmuth, Michigan — 255 elevation contours at a 3-inch interval with fall-line arrows, traced from 1-meter lidar — One of 20 mapped greens at The Fortress, 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	Frankenmuth, Michigan, United States
Address	950 Flint St, Frankenmuth, MI
Phone	(989) 652-0460
Website	zehnders.com/golf/fortressgolfcourse.htm
Holes	18
Par	72
Tees on the card	8, 8 USGA-rated
Greens mapped	20
Elevation contours	255
Contour interval	3-inch
Largest green elevation span	4.5 ft
Steepest measured slope	9.1%
Course map	Traced hole by hole
Wind modeling	Live wind grid, 16 directions
Tree canopy	1-meter canopy height model
Course data updated	2026-09-01

The card

Tees

6,813 yds · Par 72 · Rating 74.2 · Slope 142

Hole	1	2	3	4	5	6	7	8	9	Out
Par	5	3	4	3	4	5	4	4	4	36
Yards	522	167	456	149	353	501	437	409	453	3,447
Hcp	6	12	2	14	18	16	8	10	4

Hole	10	11	12	13	14	15	16	17	18	In
Par	4	4	3	4	5	4	4	3	5	36
Yards	396	391	209	443	523	350	380	172	529	3,393
Hcp	17	15	11	1	9	13	5	7	3

Total72 Yards6,840

Hole	Par	Yards	Hcp
1	5	522	6
2	3	167	12
3	4	456	2
4	3	149	14
5	4	353	18
6	5	501	16
7	4	437	8
8	4	409	10
9	4	453	4
Out	36	3,447
10	4	396	17
11	4	391	15
12	3	209	11
13	4	443	1
14	5	523	9
15	4	350	13
16	4	380	5
17	3	172	7
18	5	529	3
In	36	3,393
Total	72	6,840

Course rating and slope

Tee	Yards	Par	Rating / Slope
Black	6,813	72	74.2 / 142 80.3 / 150 (W)
Maroon	6,271	72	71.4 / 139 77.4 / 145 (W)
Combo	5,445	72	67.1 / 127 72.7 / 137 (W)
Gold	4,837	72	64.3 / 115 69.4 / 129 (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 The Fortress

GolfCore's library covers Fortress green by green: 20 putting surfaces traced with 255 elevation contours from USGS 3DEP 1-meter lidar. The steepest measured slope on these greens tilts at 9.1 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. Fortress 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 The Fortress 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 The Fortress. Represent this club? Request changes or removal through our contact page.