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BOSTON MARATHON 2023

Stephanie Kalb

Bib: 26117•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F40-44)
#0 / 1878
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
9:53/mi
30:43
↑ 97↓ 3451.5%
10K· 6.21 mi
9:39/mi
1:00:43
↑ 79↓ 1380.4%
15K· 9.32 mi
9:37/mi
1:30:35
↑ 67↓ 78
20K· 12.43 mi
10:07/mi
2:02:00
↑ 106↓ 860.1%
Half· 13.11 mi
9:54/mi
2:08:45
↑ 19↓ 370.5%
25K· 15.53 mi
10:19/mi
2:33:45
↑ 66↓ 880.2%
30K· 18.64 mi
10:57/mi
3:07:47
↑ 181↓ 1480.2%
20M
10:37/mi
3:22:13
↑ 64↓ 500.2%
21M
12:15/mi
3:34:28
↑ 106↓ 241.6%
35K· 21.75 mi
10:46/mi
3:42:31
↑ 17↓ 861.7%
23M
11:29/mi
3:56:54
↑ 23↓ 630.6%
24M
10:17/mi
4:07:11
↓ 821.3%
40K· 24.85 mi
11:21/mi
4:16:53
↓ 200.3%
25.2M
12:34/mi
4:21:13
↑ 13↓ 160.2%
Finish· 26.22 mi
9:53/mi
4:31:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:45
Pace9:49 /mi
2nd Half
Distance13.11 mi
Time2:22:32
Pace10:52 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:2630:439:5330:43
9:53
-
10K
6.21 mi12:20:261:00:439:4630:00
9:39
-0:14
15K
9.32 mi12:50:181:30:359:4329:52
9:37
-0:02
20K
12.43 mi13:21:432:02:009:4931:25
10:07
+0:30
Half
13.11 mi13:28:282:08:459:496:45
9:54
-0:13
25K
15.53 mi13:53:282:33:459:5425:00
10:19
+0:25
30K
18.64 mi14:27:303:07:4710:0434:02
10:57
+0:38
20M
20.00 mi14:41:563:22:1310:0714:26
10:37
-0:20
21M
21.00 mi14:54:113:34:2810:1312:15
12:15
+1:38
35K
21.75 mi15:02:143:42:3110:148:03
10:46
-1:29
23M
23.00 mi15:16:373:56:5410:1814:23
11:29
+0:43
24M
24.00 mi15:26:544:07:1110:1810:17
10:17
-1:12
40K
24.85 mi15:36:364:16:5310:209:42
11:21
+1:04
25.2M
25.20 mi15:40:564:21:1310:224:20
12:34
+1:13
Finish
26.22 mi15:51:004:31:1710:2110:04
9:53
-2:41

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

9:37 /mi

Average Pace

10:21 /mi

Slowest Pace

12:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

59:52

22% of race

Time at Steady Pace

2:08:40

47% of race

Time at Slower Pace

1:22:45

31% of race

Average Pace: 10:21 /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 mi11:50:2630:439:5330:43
9:53
#23160
10K
6.21 mi12:20:261:00:439:4630:00
9:39
#23102
15K
9.32 mi12:50:181:30:359:4329:52
9:37
#22939
20K
12.43 mi13:21:432:02:009:4931:25
10:07
#22983
Half
13.11 mi13:28:282:08:459:496:45
9:54
#22993
25K
15.53 mi13:53:282:33:459:5425:00
10:19
#22949
30K
18.64 mi14:27:303:07:4710:0434:02
10:57
#22973
20M
20.00 mi14:41:563:22:1310:0714:26
10:37
#22889
21M
21.00 mi14:54:113:34:2810:1312:15
12:15
#22905
35K
21.75 mi15:02:143:42:3110:148:03
10:46
#22898
23M
23.00 mi15:16:373:56:5410:1814:23
11:29
#22915
24M
24.00 mi15:26:544:07:1110:1810:17
10:17
#22845
40K
24.85 mi15:36:364:16:5310:209:42
11:21
#22857
25.2M
25.20 mi15:40:564:21:1310:224:20
12:34
#22869
Finish
26.22 mi15:51:004:31:1710:2110:04
9:53
#22837
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi231609476947622561(Top 85%)9104(Top 80%)9104(Top 485%)
10K6.21 mi3.10 mi23102+589422+549422+5422947(Top 86%)9308(Top 81%)9308(Top 496%)
15K9.32 mi3.11 mi22939+1639322+1009322+10022561(Top 85%)9104(Top 80%)9104(Top 485%)
20K12.43 mi3.11 mi22983-449339-179339-1723135(Top 87%)9421(Top 82%)9421(Top 502%)
Half13.11 mi0.68 mi22993-109340-19340-123083(Top 87%)9396(Top 82%)9396(Top 500%)
25K15.53 mi2.42 mi22949+449335+59335+522871(Top 86%)9313(Top 82%)9313(Top 496%)
30K18.64 mi3.11 mi22973-249369-349369-3423015(Top 86%)9470(Top 83%)9470(Top 504%)
20M20.00 mi1.36 mi22889+849341+289341+2821995(Top 83%)8979(Top 79%)8979(Top 478%)
21M21.00 mi1.00 mi22905-169357-169357-1623133(Top 87%)9615(Top 84%)9615(Top 512%)
35K21.75 mi0.75 mi22898+79362-59362-522855(Top 86%)9516(Top 83%)9516(Top 507%)
23M23.00 mi1.25 mi22915-179383-219383-2123228(Top 87%)9710(Top 85%)9710(Top 517%)
24M24.00 mi1.00 mi22845+709359+249359+2421537(Top 81%)8869(Top 78%)8869(Top 472%)
40K24.85 mi0.85 mi22857-129366-79366-722967(Top 86%)9643(Top 84%)9643(Top 513%)
25.2M25.20 mi0.35 mi22869-129375-99375-923398(Top 88%)9880(Top 86%)9880(Top 526%)
Finish26.22 mi1.02 mi22837+329365+109365+1021434(Top 81%)8809(Top 77%)8809(Top 469%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22561

Females

9104

F40-44

9104

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

22947

Females

9308

F40-44

9308

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22561

Females

9104

F40-44

9104

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

23135

Females

9421

F40-44

9421

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

23083

Females

9396

F40-44

9396

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

22871

Females

9313

F40-44

9313

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

23015

Females

9470

F40-44

9470

30K→20M

18.6 - 20.0 mi

Top 83%
×5story building
+64ft-50ft

Overall

21995

Females

8979

F40-44

8979

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

23133

Females

9615

F40-44

9615

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

22855

Females

9516

F40-44

9516

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

23228

Females

9710

F40-44

9710

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

21537

Females

8869

F40-44

8869

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

22967

Females

9643

F40-44

9643

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

23398

Females

9880

F40-44

9880

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

21434

Females

8809

F40-44

8809

Passing Analysis

Category:
Athletes Passed
1213
Passed By
890
Net Change
+323
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23160
5K → 10K241183+58#23160#23102
10K → 15K24077+163#23102#22939
15K → 20K115159-44#22939#22983
20K → Half2030-10#22983#22993
Half → 25K10965+44#22993#22949
25K → 30K109133-24#22949#22973
30K → 20M11430+84#22973#22889
20M → 21M4258-16#22889#22905
21M → 35K2720+7#22905#22898
35K → 23M3956-17#22898#22915
23M → 24M777+70#22915#22845
24M → 40K2739-12#22845#22857
40K → 25.2M719-12#22857#22869
25.2M → Finish4614+32#22869#22837
TOTALS1213890+323
📊

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