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BOSTON MARATHON 2023

Jemima Bird

Bib: 14073•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 48%
Masters (Masters Women)
#0 / 6539
Top 37%
Division (F50-54)
#0 / 1207
Top 29%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:08
Rank: #12084
Start → 5K
24:08 | 7:46/mi
10K· 6.21 mi
48:25
Rank: #12631 (-547)
5K → 10K
24:17 | 7:49/mi
15K· 9.32 mi
1:13:06
Rank: #13074 (-443)
10K → 15K
24:41 | 7:57/mi
20K· 12.43 mi
1:38:32
Rank: #13534 (-460)
15K → 20K
25:26 | 8:11/mi
Half· 13.11 mi
1:44:08
Rank: #13660 (-126)
20K → Half
5:36 | 8:12/mi
25K· 15.53 mi
2:04:56
Rank: #14227 (-567)
Half → 25K
20:48 | 8:35/mi
30K· 18.64 mi
2:32:48
Rank: #14790 (-563)
25K → 30K
27:52 | 8:58/mi
20M
2:45:19
Rank: #15007 (-217)
30K → 20M
12:31 | 9:13/mi
21M
2:55:18
Rank: #15194 (-187)
20M → 21M
9:59 | 9:59/mi
35K· 21.75 mi
3:02:05
Rank: #15292 (-98)
21M → 35K
6:47 | 9:04/mi
23M
3:13:59
Rank: #15531 (-239)
35K → 23M
11:54 | 9:30/mi
24M
3:23:18
Rank: #15676 (-145)
23M → 24M
9:19 | 9:19/mi
40K· 24.85 mi
3:31:28
Rank: #15825 (-149)
24M → 40K
8:10 | 9:33/mi
25.2M
3:34:54
Rank: #15840 (-15)
40K → 25.2M
3:26 | 9:57/mi
Finish· 26.22 mi
3:44:10
Rank: #15972 (-132)
25.2M → Finish
9:16 | 9:06/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:08
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time2:00:02
Pace9:09 /mi
📊Positive Split: 15.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4024:087:4624:08
7:46
-
10K
6.21 mi11:16:5748:257:4824:17
7:49
+0:03
15K
9.32 mi11:41:381:13:067:5124:41
7:57
+0:08
20K
12.43 mi12:07:041:38:327:5625:26
8:11
+0:14
Half
13.11 mi12:12:401:44:087:575:36
8:12
+0:01
25K
15.53 mi12:33:282:04:568:0320:48
8:35
+0:23
30K
18.64 mi13:01:202:32:488:1227:52
8:58
+0:23
20M
20.00 mi13:13:512:45:198:1612:31
9:13
+0:15
21M
21.00 mi13:23:502:55:188:219:59
9:59
+0:46
35K
21.75 mi13:30:373:02:058:226:47
9:04
-0:55
23M
23.00 mi13:42:313:13:598:2611:54
9:30
+0:26
24M
24.00 mi13:51:503:23:188:289:19
9:19
-0:11
40K
24.85 mi14:00:003:31:288:308:10
9:33
+0:14
25.2M
25.20 mi14:03:263:34:548:323:26
9:57
+0:24
Finish
26.22 mi14:12:423:44:108:339:16
9:06
-0:51

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

7:46 /mi

Average Pace

8:33 /mi

Slowest Pace

9:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:56

56% of race

Time at Steady Pace

1:05:45

29% of race

Time at Slower Pace

33:29

15% of race

Average Pace: 8:33 /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 mi10:52:4024:087:4624:08
7:46
#12084
10K
6.21 mi11:16:5748:257:4824:17
7:49
#12631
15K
9.32 mi11:41:381:13:067:5124:41
7:57
#13074
20K
12.43 mi12:07:041:38:327:5625:26
8:11
#13534
Half
13.11 mi12:12:401:44:087:575:36
8:12
#13660
25K
15.53 mi12:33:282:04:568:0320:48
8:35
#14227
30K
18.64 mi13:01:202:32:488:1227:52
8:58
#14790
20M
20.00 mi13:13:512:45:198:1612:31
9:13
#15007
21M
21.00 mi13:23:502:55:188:219:59
9:59
#15194
35K
21.75 mi13:30:373:02:058:226:47
9:04
#15292
23M
23.00 mi13:42:313:13:598:2611:54
9:30
#15531
24M
24.00 mi13:51:503:23:188:289:19
9:19
#15676
40K
24.85 mi14:00:003:31:288:308:10
9:33
#15825
25.2M
25.20 mi14:03:263:34:548:323:26
9:57
#15840
Finish
26.22 mi14:12:423:44:108:339:16
9:06
#15972
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi120842922292213975(Top 52%)4074(Top 36%)4074(Top 338%)
10K6.21 mi3.10 mi12631-5473228-3063228-30613292(Top 50%)3610(Top 32%)3610(Top 299%)
15K9.32 mi3.11 mi13074-4433508-2803508-28013975(Top 52%)4074(Top 36%)4074(Top 338%)
20K12.43 mi3.11 mi13534-4603801-2933801-29314904(Top 56%)4653(Top 41%)4653(Top 386%)
Half13.11 mi0.68 mi13660-1263886-853886-8515916(Top 60%)5248(Top 46%)5248(Top 435%)
25K15.53 mi2.42 mi14227-5674248-3624248-36216692(Top 63%)5826(Top 51%)5826(Top 483%)
30K18.64 mi3.11 mi14790-5634611-3634611-36317006(Top 64%)6064(Top 53%)6064(Top 502%)
20M20.00 mi1.36 mi15007-2174779-1684779-16817598(Top 66%)6510(Top 57%)6510(Top 539%)
21M21.00 mi1.00 mi15194-1874919-1404919-14017975(Top 68%)6740(Top 59%)6740(Top 558%)
35K21.75 mi0.75 mi15292-985001-825001-8218171(Top 68%)6923(Top 61%)6923(Top 574%)
23M23.00 mi1.25 mi15531-2395186-1855186-18518351(Top 69%)7043(Top 62%)7043(Top 584%)
24M24.00 mi1.00 mi15676-1455290-1045290-10418526(Top 70%)7177(Top 63%)7177(Top 595%)
40K24.85 mi0.85 mi15825-1495379-895379-8918511(Top 70%)7215(Top 63%)7215(Top 598%)
25.2M25.20 mi0.35 mi15840-155389-105389-1017214(Top 65%)6540(Top 57%)6540(Top 542%)
Finish26.22 mi1.02 mi15972-1325473-845473-8418438(Top 69%)7134(Top 62%)7134(Top 591%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21stories
+97ft-345ft

Overall

13975

Females

4074

F50-54

4074

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

13292

Females

3610

F50-54

3610

10K→15K

6.2 - 9.3 mi

Top 52%
×3stories
+67ft-78ft

Overall

13975

Females

4074

F50-54

4074

15K→20K

9.3 - 12.4 mi

Top 56%
×5stories
+106ft-86ft

Overall

14904

Females

4653

F50-54

4653

20K→Half

12.4 - 13.1 mi

Top 60%
×2stories
+19ft-37ft

Overall

15916

Females

5248

F50-54

5248

Half→25K

13.1 - 15.5 mi

Top 63%
×4stories
+66ft-88ft

Overall

16692

Females

5826

F50-54

5826

25K→30K

15.5 - 18.6 mi

Top 64%
×9stories
+181ft-148ft

Overall

17006

Females

6064

F50-54

6064

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

17598

Females

6510

F50-54

6510

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

17975

Females

6740

F50-54

6740

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

18171

Females

6923

F50-54

6923

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

18351

Females

7043

F50-54

7043

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

18526

Females

7177

F50-54

7177

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18511

Females

7215

F50-54

7215

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17214

Females

6540

F50-54

6540

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2stories
+22ft-21ft

Overall

18438

Females

7134

F50-54

7134

Passing Analysis

Category:
Athletes Passed
612
Passed By
4500
Net Change
-3888
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12084
5K → 10K117664-547#12084#12631
10K → 15K72515-443#12631#13074
15K → 20K80540-460#13074#13534
20K → Half6132-126#13534#13660
Half → 25K37604-567#13660#14227
25K → 30K54617-563#14227#14790
30K → 20M35252-217#14790#15007
20M → 21M45232-187#15007#15194
21M → 35K21119-98#15194#15292
35K → 23M41280-239#15292#15531
23M → 24M29174-145#15531#15676
24M → 40K30179-149#15676#15825
40K → 25.2M2035-15#15825#15840
25.2M → Finish25157-132#15840#15972
TOTALS6124500-3888
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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