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BOSTON MARATHON 2023

Gail Shurlow

Bib: 23421•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Top 30%
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
8:53/mi
27:36
↑ 97↓ 3451.5%
10K· 6.21 mi
8:23/mi
53:38
↑ 79↓ 1380.4%
15K· 9.32 mi
8:36/mi
1:20:22
↑ 67↓ 78
20K· 12.43 mi
8:42/mi
1:47:25
↑ 106↓ 860.1%
Half· 13.11 mi
8:42/mi
1:53:21
↑ 19↓ 370.5%
25K· 15.53 mi
8:55/mi
2:14:58
↑ 66↓ 880.2%
30K· 18.64 mi
9:18/mi
2:43:52
↑ 181↓ 1480.2%
20M
9:21/mi
2:56:35
↑ 64↓ 500.2%
21M
10:05/mi
3:06:40
↑ 106↓ 241.6%
35K· 21.75 mi
8:48/mi
3:13:15
↑ 17↓ 861.7%
23M
9:07/mi
3:24:40
↑ 23↓ 630.6%
24M
8:38/mi
3:33:18
↓ 821.3%
40K· 24.85 mi
8:54/mi
3:40:55
↓ 200.3%
25.2M
9:37/mi
3:44:14
↑ 13↓ 160.2%
Finish· 26.22 mi
8:39/mi
3:53:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:21
Pace8:39 /mi
2nd Half
Distance13.11 mi
Time1:59:42
Pace9:08 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:4727:368:5327:36
8:53
-
10K
6.21 mi11:48:4953:388:3826:02
8:23
-0:30
15K
9.32 mi12:15:331:20:228:3726:44
8:36
+0:13
20K
12.43 mi12:42:361:47:258:3927:03
8:42
+0:06
Half
13.11 mi12:48:321:53:218:395:56
8:42
0:00
25K
15.53 mi13:10:092:14:588:4121:37
8:55
+0:13
30K
18.64 mi13:39:032:43:528:4728:54
9:18
+0:23
20M
20.00 mi13:51:462:56:358:5012:43
9:21
+0:03
21M
21.00 mi14:01:513:06:408:5310:05
10:05
+0:44
35K
21.75 mi14:08:263:13:158:536:35
8:48
-1:17
23M
23.00 mi14:19:513:24:408:5411:25
9:07
+0:19
24M
24.00 mi14:28:293:33:188:538:38
8:38
-0:29
40K
24.85 mi14:36:063:40:558:537:37
8:54
+0:16
25.2M
25.20 mi14:39:253:44:148:543:19
9:37
+0:43
Finish
26.22 mi14:48:143:53:038:548:49
8:39
-0:58

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

8:23 /mi

Average Pace

8:54 /mi

Slowest Pace

10:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:13

30% of race

Time at Steady Pace

1:36:24

41% of race

Time at Slower Pace

1:06:26

29% of race

Average Pace: 8:53 /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 mi11:22:4727:368:5327:36
8:53
#19910
10K
6.21 mi11:48:4953:388:3826:02
8:23
#18701
15K
9.32 mi12:15:331:20:228:3726:44
8:36
#18608
20K
12.43 mi12:42:361:47:258:3927:03
8:42
#18481
Half
13.11 mi12:48:321:53:218:395:56
8:42
#18490
25K
15.53 mi13:10:092:14:588:4121:37
8:55
#18507
30K
18.64 mi13:39:032:43:528:4728:54
9:18
#18522
20M
20.00 mi13:51:462:56:358:5012:43
9:21
#18491
21M
21.00 mi14:01:513:06:408:5310:05
10:05
#18481
35K
21.75 mi14:08:263:13:158:536:35
8:48
#18409
23M
23.00 mi14:19:513:24:408:5411:25
9:07
#18301
24M
24.00 mi14:28:293:33:188:538:38
8:38
#18181
40K
24.85 mi14:36:063:40:558:537:37
8:54
#18095
25.2M
25.20 mi14:39:253:44:148:543:19
9:37
#18057
Finish
26.22 mi14:48:143:53:038:548:49
8:39
#17984
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi199107749774918489(Top 69%)6792(Top 59%)6792(Top 833%)
10K6.21 mi3.10 mi18701+12096948+8016948+80117468(Top 66%)6166(Top 54%)6166(Top 757%)
15K9.32 mi3.11 mi18608+936887+616887+6118489(Top 69%)6792(Top 59%)6792(Top 833%)
20K12.43 mi3.11 mi18481+1276790+976790+9718172(Top 68%)6603(Top 58%)6603(Top 810%)
Half13.11 mi0.68 mi18490-96799-96799-918949(Top 71%)7048(Top 62%)7048(Top 865%)
25K15.53 mi2.42 mi18507-176835-366835-3618546(Top 70%)6878(Top 60%)6878(Top 844%)
30K18.64 mi3.11 mi18522-156881-466881-4618639(Top 70%)6994(Top 61%)6994(Top 858%)
20M20.00 mi1.36 mi18491+316861+206861+2018274(Top 69%)6891(Top 60%)6891(Top 846%)
21M21.00 mi1.00 mi18481+106869-86869-818332(Top 69%)6951(Top 61%)6951(Top 853%)
35K21.75 mi0.75 mi18409+726839+306839+3016977(Top 64%)6271(Top 55%)6271(Top 769%)
23M23.00 mi1.25 mi18301+1086793+466793+4616659(Top 63%)6122(Top 54%)6122(Top 751%)
24M24.00 mi1.00 mi18181+1206731+626731+6215320(Top 58%)5432(Top 48%)5432(Top 667%)
40K24.85 mi0.85 mi18095+866693+386693+3815696(Top 59%)5688(Top 50%)5688(Top 698%)
25.2M25.20 mi0.35 mi18057+386679+146679+1415819(Top 59%)5775(Top 51%)5775(Top 709%)
Finish26.22 mi1.02 mi17984+736645+346645+3416284(Top 61%)5991(Top 52%)5991(Top 735%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

18489

Females

6792

F55-59

6792

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

17468

Females

6166

F55-59

6166

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

18489

Females

6792

F55-59

6792

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

18172

Females

6603

F55-59

6603

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

18949

Females

7048

F55-59

7048

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

18546

Females

6878

F55-59

6878

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

18639

Females

6994

F55-59

6994

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

18274

Females

6891

F55-59

6891

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

18332

Females

6951

F55-59

6951

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

16977

Females

6271

F55-59

6271

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16659

Females

6122

F55-59

6122

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

15320

Females

5432

F55-59

5432

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15696

Females

5688

F55-59

5688

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15819

Females

5775

F55-59

5775

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

16284

Females

5991

F55-59

5991

Passing Analysis

Category:
Athletes Passed
2819
Passed By
893
Net Change
+1926
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19910
5K → 10K126455+1209#19910#18701
10K → 15K223130+93#18701#18608
15K → 20K22194+127#18608#18481
20K → Half2635-9#18481#18490
Half → 25K129146-17#18490#18507
25K → 30K172187-15#18507#18522
30K → 20M10473+31#18522#18491
20M → 21M8979+10#18491#18481
21M → 35K9119+72#18481#18409
35K → 23M13628+108#18409#18301
23M → 24M1266+120#18301#18181
24M → 40K9711+86#18181#18095
40K → 25.2M468+38#18095#18057
25.2M → Finish9522+73#18057#17984
TOTALS2819893+1926
📊

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