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BOSTON MARATHON 2023

Julia Blacker

Bib: 24912•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:50
Rank: #24871
Start → 5K
32:50 | 10:34/mi
10K· 6.21 mi
1:05:43
Rank: #24861 (+10)
5K → 10K
32:53 | 10:35/mi
15K· 9.32 mi
1:38:02
Rank: #24660 (+201)
10K → 15K
32:19 | 10:24/mi
20K· 12.43 mi
2:10:53
Rank: #24477 (+183)
15K → 20K
32:51 | 10:34/mi
Half· 13.11 mi
2:17:59
Rank: #24450 (+27)
20K → Half
7:06 | 10:24/mi
25K· 15.53 mi
2:43:59
Rank: #24286 (+164)
Half → 25K
26:00 | 10:43/mi
30K· 18.64 mi
3:18:52
Rank: #24106 (+180)
25K → 30K
34:53 | 11:14/mi
20M
3:34:10
Rank: #24046 (+60)
30K → 20M
15:18 | 11:16/mi
21M
3:46:08
Rank: #23986 (+60)
20M → 21M
11:58 | 11:58/mi
35K· 21.75 mi
3:54:08
Rank: #23952 (+34)
21M → 35K
8:00 | 10:42/mi
23M
4:07:58
Rank: #23883 (+69)
35K → 23M
13:50 | 11:03/mi
24M
4:17:54
Rank: #23772 (+111)
23M → 24M
9:56 | 9:56/mi
40K· 24.85 mi
4:26:41
Rank: #23678 (+94)
24M → 40K
8:47 | 10:16/mi
25.2M
4:30:52
Rank: #23666 (+12)
40K → 25.2M
4:11 | 12:08/mi
Finish· 26.22 mi
4:40:56
Rank: #23614 (+52)
25.2M → Finish
10:04 | 9:53/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:17:59
Pace10:32 /mi
2nd Half
Distance13.11 mi
Time2:22:57
Pace10:54 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:1532:5010:3432:50
10:34
-
10K
6.21 mi12:28:081:05:4310:3532:53
10:35
+0:01
15K
9.32 mi13:00:271:38:0210:3132:19
10:24
-0:11
20K
12.43 mi13:33:182:10:5310:3232:51
10:34
+0:10
Half
13.11 mi13:40:242:17:5910:327:06
10:24
-0:10
25K
15.53 mi14:06:242:43:5910:3326:00
10:43
+0:19
30K
18.64 mi14:41:173:18:5210:4034:53
11:14
+0:31
20M
20.00 mi14:56:353:34:1010:4215:18
11:16
+0:02
21M
21.00 mi15:08:333:46:0810:4611:58
11:58
+0:42
35K
21.75 mi15:16:333:54:0810:468:00
10:42
-1:16
23M
23.00 mi15:30:234:07:5810:4713:50
11:03
+0:21
24M
24.00 mi15:40:194:17:5410:459:56
9:56
-1:07
40K
24.85 mi15:49:064:26:4110:448:47
10:16
+0:20
25.2M
25.20 mi15:53:174:30:5210:454:11
12:08
+1:52
Finish
26.22 mi16:03:214:40:5610:4310:04
9:53
-2:15

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

9:53 /mi

Average Pace

10:43 /mi

Slowest Pace

12:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

28:47

10% of race

Time at Steady Pace

2:51:59

61% of race

Time at Slower Pace

1:20:10

29% of race

Average Pace: 10:43 /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 mi11:55:1532:5010:3432:50
10:34
#24871
10K
6.21 mi12:28:081:05:4310:3532:53
10:35
#24861
15K
9.32 mi13:00:271:38:0210:3132:19
10:24
#24660
20K
12.43 mi13:33:182:10:5310:3232:51
10:34
#24477
Half
13.11 mi13:40:242:17:5910:327:06
10:24
#24450
25K
15.53 mi14:06:242:43:5910:3326:00
10:43
#24286
30K
18.64 mi14:41:173:18:5210:4034:53
11:14
#24106
20M
20.00 mi14:56:353:34:1010:4215:18
11:16
#24046
21M
21.00 mi15:08:333:46:0810:4611:58
11:58
#23986
35K
21.75 mi15:16:333:54:0810:468:00
10:42
#23952
23M
23.00 mi15:30:234:07:5810:4713:50
11:03
#23883
24M
24.00 mi15:40:194:17:5410:459:56
9:56
#23772
40K
24.85 mi15:49:064:26:4110:448:47
10:16
#23678
25.2M
25.20 mi15:53:174:30:5210:454:11
12:08
#23666
Finish
26.22 mi16:03:214:40:5610:4310:04
9:53
#23614
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24871103701037024286(Top 91%)10047(Top 88%)10047(Top 206%)
10K6.21 mi3.10 mi24861+1010357+1310357+1324824(Top 93%)10338(Top 91%)10338(Top 212%)
15K9.32 mi3.11 mi24660+20110257+10010257+10024286(Top 91%)10047(Top 88%)10047(Top 206%)
20K12.43 mi3.11 mi24477+18310159+9810159+9823968(Top 90%)9886(Top 87%)9886(Top 202%)
Half13.11 mi0.68 mi24450+2710148+1110148+1124041(Top 90%)9932(Top 87%)9932(Top 203%)
25K15.53 mi2.42 mi24286+16410067+8110067+8123554(Top 88%)9706(Top 85%)9706(Top 199%)
30K18.64 mi3.11 mi24106+1809975+929975+9223460(Top 88%)9712(Top 85%)9712(Top 199%)
20M20.00 mi1.36 mi24046+609959+169959+1623118(Top 87%)9580(Top 84%)9580(Top 196%)
21M21.00 mi1.00 mi23986+609933+269933+2622713(Top 85%)9398(Top 82%)9398(Top 192%)
35K21.75 mi0.75 mi23952+349920+139920+1322755(Top 85%)9460(Top 83%)9460(Top 194%)
23M23.00 mi1.25 mi23883+699890+309890+3022435(Top 84%)9289(Top 81%)9289(Top 190%)
24M24.00 mi1.00 mi23772+1119834+569834+5620622(Top 77%)8345(Top 73%)8345(Top 171%)
40K24.85 mi0.85 mi23678+949790+449790+4420691(Top 78%)8442(Top 74%)8442(Top 173%)
25.2M25.20 mi0.35 mi23666+129791-19791-122753(Top 85%)9530(Top 83%)9530(Top 195%)
Finish26.22 mi1.02 mi23614+529767+249767+2421441(Top 81%)8816(Top 77%)8816(Top 181%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×21stories
+97ft-345ft

Overall

24286

Females

10047

F18-39

10047

5K→10K

3.1 - 6.2 mi

Top 93%
×5stories
+79ft-138ft

Overall

24824

Females

10338

F18-39

10338

10K→15K

6.2 - 9.3 mi

Top 91%
×3stories
+67ft-78ft

Overall

24286

Females

10047

F18-39

10047

15K→20K

9.3 - 12.4 mi

Top 90%
×5stories
+106ft-86ft

Overall

23968

Females

9886

F18-39

9886

20K→Half

12.4 - 13.1 mi

Top 90%
×2stories
+19ft-37ft

Overall

24041

Females

9932

F18-39

9932

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

23554

Females

9706

F18-39

9706

25K→30K

15.5 - 18.6 mi

Top 88%
×9stories
+181ft-148ft

Overall

23460

Females

9712

F18-39

9712

30K→20M

18.6 - 20.0 mi

Top 87%
×5stories
+64ft-50ft

Overall

23118

Females

9580

F18-39

9580

20M→21M

20.0 - 21.0 mi

Top 85%
×8stories
+106ft-24ft

Overall

22713

Females

9398

F18-39

9398

21M→35K

21.0 - 21.8 mi

Top 85%
×7stories
+17ft-86ft

Overall

22755

Females

9460

F18-39

9460

35K→23M

21.8 - 23.0 mi

Top 84%
×5stories
+23ft-63ft

Overall

22435

Females

9289

F18-39

9289

23M→24M

23.0 - 24.0 mi

Top 77%
×6stories
+12ft-82ft

Overall

20622

Females

8345

F18-39

8345

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

20691

Females

8442

F18-39

8442

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22753

Females

9530

F18-39

9530

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

21441

Females

8816

F18-39

8816

Passing Analysis

Category:
Athletes Passed
1639
Passed By
382
Net Change
+1257
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24871
5K → 10K195185+10#24871#24861
10K → 15K23231+201#24861#24660
15K → 20K20522+183#24660#24477
20K → Half3912+27#24477#24450
Half → 25K17713+164#24450#24286
25K → 30K21434+180#24286#24106
30K → 20M8525+60#24106#24046
20M → 21M7515+60#24046#23986
21M → 35K4915+34#23986#23952
35K → 23M7910+69#23952#23883
23M → 24M1143+111#23883#23772
24M → 40K962+94#23772#23678
40K → 25.2M175+12#23678#23666
25.2M → Finish6210+52#23666#23614
TOTALS1639382+1257
📊

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