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BOSTON MARATHON 2023

Stacy Koll

Bib: 17964•F

MN

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 35%
Masters (Masters Women)
#0 / 6539
Top 22%
Division (F40-44)
#0 / 1878
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:00/mi
24:50
↑ 97↓ 3451.5%
10K· 6.21 mi
7:53/mi
49:21
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:14:06
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:39:02
↑ 106↓ 860.1%
Half· 13.11 mi
7:59/mi
1:44:29
↑ 19↓ 370.5%
25K· 15.53 mi
8:10/mi
2:04:16
↑ 66↓ 880.2%
30K· 18.64 mi
8:31/mi
2:30:43
↑ 181↓ 1480.2%
20M
8:29/mi
2:42:15
↑ 64↓ 500.2%
21M
8:53/mi
2:51:08
↑ 106↓ 241.6%
35K· 21.75 mi
8:00/mi
2:57:07
↑ 17↓ 861.7%
23M
8:27/mi
3:07:42
↑ 23↓ 630.6%
24M
8:24/mi
3:16:06
↓ 821.3%
40K· 24.85 mi
8:36/mi
3:23:27
↓ 200.3%
25.2M
9:05/mi
3:26:35
↑ 13↓ 160.2%
Finish· 26.22 mi
7:50/mi
3:34:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:29
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:50:05
Pace8:24 /mi
📊Positive Split: 5.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0824:508:0024:50
8:00
-
10K
6.21 mi11:40:3949:217:5724:31
7:53
-0:07
15K
9.32 mi12:05:241:14:067:5724:45
7:58
+0:05
20K
12.43 mi12:30:201:39:027:5824:56
8:02
+0:04
Half
13.11 mi12:35:471:44:297:585:27
7:59
-0:03
25K
15.53 mi12:55:342:04:168:0019:47
8:10
+0:11
30K
18.64 mi13:22:012:30:438:0526:27
8:31
+0:21
20M
20.00 mi13:33:332:42:158:0711:32
8:29
-0:02
21M
21.00 mi13:42:262:51:088:098:53
8:53
+0:24
35K
21.75 mi13:48:252:57:078:095:59
8:00
-0:53
23M
23.00 mi13:59:003:07:428:1010:35
8:27
+0:27
24M
24.00 mi14:07:243:16:068:108:24
8:24
-0:03
40K
24.85 mi14:14:453:23:278:117:21
8:36
+0:12
25.2M
25.20 mi14:17:533:26:358:123:08
9:05
+0:29
Finish
26.22 mi14:25:523:34:348:117:59
7:50
-1:15

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:50 /mi

Average Pace

8:11 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:22:33

94% of race

Time at Steady Pace

12:01

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:11 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:16:0824:508:0024:50
8:00
#13980
10K
6.21 mi11:40:3949:217:5724:31
7:53
#13933
15K
9.32 mi12:05:241:14:067:5724:45
7:58
#13974
20K
12.43 mi12:30:201:39:027:5824:56
8:02
#13854
Half
13.11 mi12:35:471:44:297:585:27
7:59
#13867
25K
15.53 mi12:55:342:04:168:0019:47
8:10
#13871
30K
18.64 mi13:22:012:30:438:0526:27
8:31
#13982
20M
20.00 mi13:33:332:42:158:0711:32
8:29
#13933
21M
21.00 mi13:42:262:51:088:098:53
8:53
#13842
35K
21.75 mi13:48:252:57:078:095:59
8:00
#13757
23M
23.00 mi13:59:003:07:428:1010:35
8:27
#13674
24M
24.00 mi14:07:243:16:068:108:24
8:24
#13664
40K
24.85 mi14:14:453:23:278:117:21
8:36
#13651
25.2M
25.20 mi14:17:533:26:358:123:08
9:05
#13631
Finish
26.22 mi14:25:523:34:348:117:59
7:50
#13515
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi139804018401814121(Top 53%)4157(Top 36%)4157(Top 221%)
10K6.21 mi3.10 mi13933+473998+203998+2013921(Top 52%)3997(Top 35%)3997(Top 213%)
15K9.32 mi3.11 mi13974-414042-444042-4414121(Top 53%)4157(Top 36%)4157(Top 221%)
20K12.43 mi3.11 mi13854+1203993+493993+4913662(Top 51%)3912(Top 34%)3912(Top 208%)
Half13.11 mi0.68 mi13867-134006-134006-1314316(Top 54%)4260(Top 37%)4260(Top 227%)
25K15.53 mi2.42 mi13871-44036-304036-3013949(Top 52%)4185(Top 37%)4185(Top 223%)
30K18.64 mi3.11 mi13982-1114130-944130-9414407(Top 54%)4564(Top 40%)4564(Top 243%)
20M20.00 mi1.36 mi13933+494118+124118+1213564(Top 51%)4153(Top 36%)4153(Top 221%)
21M21.00 mi1.00 mi13842+914078+404078+4012784(Top 48%)3835(Top 34%)3835(Top 204%)
35K21.75 mi0.75 mi13757+854046+324046+3212171(Top 46%)3534(Top 31%)3534(Top 188%)
23M23.00 mi1.25 mi13674+834022+244022+2412943(Top 49%)4039(Top 35%)4039(Top 215%)
24M24.00 mi1.00 mi13664+104040-184040-1813892(Top 52%)4607(Top 40%)4607(Top 245%)
40K24.85 mi0.85 mi13651+134052-124052-1213948(Top 52%)4711(Top 41%)4711(Top 251%)
25.2M25.20 mi0.35 mi13631+204044+84044+813063(Top 49%)4261(Top 37%)4261(Top 227%)
Finish26.22 mi1.02 mi13515+1163999+453999+4510978(Top 41%)3186(Top 28%)3186(Top 170%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14121

Females

4157

F40-44

4157

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

13921

Females

3997

F40-44

3997

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14121

Females

4157

F40-44

4157

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13662

Females

3912

F40-44

3912

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

14316

Females

4260

F40-44

4260

Half→25K

13.1 - 15.5 mi

Top 52%
×4story building
+66ft-88ft

Overall

13949

Females

4185

F40-44

4185

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

14407

Females

4564

F40-44

4564

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

13564

Females

4153

F40-44

4153

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

12784

Females

3835

F40-44

3835

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12171

Females

3534

F40-44

3534

35K→23M

21.8 - 23.0 mi

Top 49%
×5story building
+23ft-63ft

Overall

12943

Females

4039

F40-44

4039

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

13892

Females

4607

F40-44

4607

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13948

Females

4711

F40-44

4711

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13063

Females

4261

F40-44

4261

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

10978

Females

3186

F40-44

3186

Passing Analysis

Category:
Athletes Passed
1830
Passed By
1365
Net Change
+465
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13980
5K → 10K310263+47#13980#13933
10K → 15K171212-41#13933#13974
15K → 20K230110+120#13974#13854
20K → Half3043-13#13854#13867
Half → 25K128132-4#13867#13871
25K → 30K153264-111#13871#13982
30K → 20M12071+49#13982#13933
20M → 21M13443+91#13933#13842
21M → 35K9813+85#13842#13757
35K → 23M13047+83#13757#13674
23M → 24M7464+10#13674#13664
24M → 40K7360+13#13664#13651
40K → 25.2M4626+20#13651#13631
25.2M → Finish13317+116#13631#13515
TOTALS18301365+465
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing