Sinnissippi 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.

9Greens Mapped 109Elevation Contours 12.2%Steepest Slope 9Holes 37Par 6Rated Tees

Green contour map of Sinnissippi in Rockford, Illinois — 109 elevation contours at a 3-inch interval with fall-line arrows, traced from 1-meter lidar — One of 9 mapped greens at Sinnissippi, 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	Rockford, Illinois, United States
Address	Rockford, IL
Phone	+1 815-987-8838
Website	golfrockford.org/sinnissippi-golf-course
Holes	9
Par	37
Tees on the card	6, 6 USGA-rated
Greens mapped	9
Elevation contours	109
Contour interval	3-inch
Largest green elevation span	5.2 ft
Steepest measured slope	12.2%
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

6,296 yds · Par 74 · Rating 70.2 · Slope 118

Hole	1	2	3	4	5	6	7	8	9	Out
Par	4	4	3	5	4	5	4	4	4	37
Yards	315	334	180	456	295	470	373	315	312	3,050
Hcp	–	–	–	–	–	–	–	–	–

Hole	10	11	12	13	14	15	16	17	18	In
Par	4	4	3	5	4	5	4	4	4	37
Yards	333	320	190	446	386	470	376	315	312	3,148
Hcp	10	16	18	4	8	2	6	12	14

Total74 Yards6,198

Hole	Par	Yards	Hcp
1	4	315	–
2	4	334	–
3	3	180	–
4	5	456	–
5	4	295	–
6	5	470	–
7	4	373	–
8	4	315	–
9	4	312	–
Out	37	3,050
10	4	333	10
11	4	320	16
12	3	190	18
13	5	446	4
14	4	386	8
15	5	470	2
16	4	376	6
17	4	315	12
18	4	312	14
In	37	3,148
Total	74	6,198

Course rating and slope

Tee	Yards	Par	Rating / Slope
Blue	6,710	74	72.0 / 123 78.0 / 131 (W)
White	6,296	74	70.2 / 118 75.8 / 128 (W)
Red	5,258	72	65.4 / 106 70.2 / 116 (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 Sinnissippi

GolfCore's library covers Sinnissippi Golf Course green by green: 9 putting surfaces traced with 109 elevation contours from USGS 3DEP 1-meter lidar. The steepest measured slope on these greens tilts at 12.2 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. Sinnissippi Golf Course 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 Sinnissippi 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 Sinnissippi. Represent this club? Request changes or removal through our contact page.