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BOSTON MARATHON 2023

Katherine Ambrosini

Bib: 29329•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
32:41
Rank: #24759
Start → 5K
32:41 | 10:31/mi
10K· 6.21 mi
1:04:17
Rank: #24381 (+378)
5K → 10K
31:36 | 10:10/mi
15K· 9.32 mi
1:35:23
Rank: #24088 (+293)
10K → 15K
31:06 | 10:01/mi
20K· 12.43 mi
2:07:11
Rank: #23878 (+210)
15K → 20K
31:48 | 10:14/mi
Half· 13.11 mi
2:14:27
Rank: #23916 (-38)
20K → Half
7:16 | 10:39/mi
25K· 15.53 mi
2:40:08
Rank: #23792 (+124)
Half → 25K
25:41 | 10:36/mi
30K· 18.64 mi
3:15:26
Rank: #23783 (+9)
25K → 30K
35:18 | 11:22/mi
20M
3:30:10
Rank: #23663 (+120)
30K → 20M
14:44 | 10:51/mi
21M
3:42:28
Rank: #23649 (+14)
20M → 21M
12:18 | 12:18/mi
35K· 21.75 mi
3:50:36
Rank: #23636 (+13)
21M → 35K
8:08 | 10:52/mi
23M
4:04:04
Rank: #23560 (+76)
35K → 23M
13:28 | 10:45/mi
24M
4:15:40
Rank: #23580 (-20)
23M → 24M
11:36 | 11:36/mi
40K· 24.85 mi
4:24:58
Rank: #23545 (+35)
24M → 40K
9:18 | 10:53/mi
25.2M
4:28:50
Rank: #23512 (+33)
40K → 25.2M
3:52 | 11:13/mi
Finish· 26.22 mi
4:38:50
Rank: #23442 (+70)
25.2M → Finish
10:00 | 9:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:14:27
Pace10:15 /mi
2nd Half
Distance13.11 mi
Time2:24:23
Pace11:01 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:1332:4110:3132:41
10:31
-
10K
6.21 mi12:20:491:04:1710:2131:36
10:10
-0:21
15K
9.32 mi12:51:551:35:2310:1431:06
10:01
-0:09
20K
12.43 mi13:23:432:07:1110:1431:48
10:14
+0:13
Half
13.11 mi13:30:592:14:2710:157:16
10:39
+0:25
25K
15.53 mi13:56:402:40:0810:1925:41
10:36
-0:03
30K
18.64 mi14:31:583:15:2610:2935:18
11:22
+0:46
20M
20.00 mi14:46:423:30:1010:3014:44
10:51
-0:31
21M
21.00 mi14:59:003:42:2810:3612:18
12:18
+1:27
35K
21.75 mi15:07:083:50:3610:368:08
10:52
-1:26
23M
23.00 mi15:20:364:04:0410:3713:28
10:45
-0:07
24M
24.00 mi15:32:124:15:4010:3911:36
11:36
+0:51
40K
24.85 mi15:41:304:24:5810:409:18
10:53
-0:43
25.2M
25.20 mi15:45:224:28:5010:403:52
11:13
+0:20
Finish
26.22 mi15:55:224:38:5010:3910:00
9:49
-1:24

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

9:49 /mi

Average Pace

10:39 /mi

Slowest Pace

12:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:30

37% of race

Time at Steady Pace

1:51:16

40% of race

Time at Slower Pace

1:03:04

23% of race

Average Pace: 10:38 /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 mi11:49:1332:4110:3132:41
10:31
#24759
10K
6.21 mi12:20:491:04:1710:2131:36
10:10
#24381
15K
9.32 mi12:51:551:35:2310:1431:06
10:01
#24088
20K
12.43 mi13:23:432:07:1110:1431:48
10:14
#23878
Half
13.11 mi13:30:592:14:2710:157:16
10:39
#23916
25K
15.53 mi13:56:402:40:0810:1925:41
10:36
#23792
30K
18.64 mi14:31:583:15:2610:2935:18
11:22
#23783
20M
20.00 mi14:46:423:30:1010:3014:44
10:51
#23663
21M
21.00 mi14:59:003:42:2810:3612:18
12:18
#23649
35K
21.75 mi15:07:083:50:3610:368:08
10:52
#23636
23M
23.00 mi15:20:364:04:0410:3713:28
10:45
#23560
24M
24.00 mi15:32:124:15:4010:3911:36
11:36
#23580
40K
24.85 mi15:41:304:24:5810:409:18
10:53
#23545
25.2M
25.20 mi15:45:224:28:5010:403:52
11:13
#23512
Finish
26.22 mi15:55:224:38:5010:3910:00
9:49
#23442
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24759103071030723522(Top 88%)9617(Top 84%)9617(Top 197%)
10K6.21 mi3.10 mi24381+37810094+21310094+21324069(Top 90%)9926(Top 87%)9926(Top 203%)
15K9.32 mi3.11 mi24088+2939941+1539941+15323522(Top 88%)9617(Top 84%)9617(Top 197%)
20K12.43 mi3.11 mi23878+2109821+1209821+12023360(Top 88%)9547(Top 84%)9547(Top 195%)
Half13.11 mi0.68 mi23916-389844-239844-2324466(Top 92%)10186(Top 89%)10186(Top 209%)
25K15.53 mi2.42 mi23792+1249784+609784+6023341(Top 88%)9582(Top 84%)9582(Top 196%)
30K18.64 mi3.11 mi23783+99798-149798-1423664(Top 89%)9814(Top 86%)9814(Top 201%)
20M20.00 mi1.36 mi23663+1209746+529746+5222423(Top 84%)9212(Top 81%)9212(Top 189%)
21M21.00 mi1.00 mi23649+149744+29744+223202(Top 87%)9655(Top 85%)9655(Top 198%)
35K21.75 mi0.75 mi23636+139739+59739+523081(Top 87%)9635(Top 84%)9635(Top 197%)
23M23.00 mi1.25 mi23560+769704+359704+3521891(Top 82%)9015(Top 79%)9015(Top 185%)
24M24.00 mi1.00 mi23580-209725-219725-2124008(Top 90%)10166(Top 89%)10166(Top 208%)
40K24.85 mi0.85 mi23545+359715+109715+1022114(Top 83%)9202(Top 81%)9202(Top 188%)
25.2M25.20 mi0.35 mi23512+339707+89707+820991(Top 79%)8597(Top 75%)8597(Top 176%)
Finish26.22 mi1.02 mi23442+709683+249683+2421224(Top 80%)8681(Top 76%)8681(Top 178%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21stories
+97ft-345ft

Overall

23522

Females

9617

F18-39

9617

5K→10K

3.1 - 6.2 mi

Top 90%
×5stories
+79ft-138ft

Overall

24069

Females

9926

F18-39

9926

10K→15K

6.2 - 9.3 mi

Top 88%
×3stories
+67ft-78ft

Overall

23522

Females

9617

F18-39

9617

15K→20K

9.3 - 12.4 mi

Top 88%
×5stories
+106ft-86ft

Overall

23360

Females

9547

F18-39

9547

20K→Half

12.4 - 13.1 mi

Top 92%
×2stories
+19ft-37ft

Overall

24466

Females

10186

F18-39

10186

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

23341

Females

9582

F18-39

9582

25K→30K

15.5 - 18.6 mi

Top 89%
×9stories
+181ft-148ft

Overall

23664

Females

9814

F18-39

9814

30K→20M

18.6 - 20.0 mi

Top 84%
×5stories
+64ft-50ft

Overall

22423

Females

9212

F18-39

9212

20M→21M

20.0 - 21.0 mi

Top 87%
×8stories
+106ft-24ft

Overall

23202

Females

9655

F18-39

9655

21M→35K

21.0 - 21.8 mi

Top 87%
×7stories
+17ft-86ft

Overall

23081

Females

9635

F18-39

9635

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

21891

Females

9015

F18-39

9015

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

24008

Females

10166

F18-39

10166

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

22114

Females

9202

F18-39

9202

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

20991

Females

8597

F18-39

8597

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

21224

Females

8681

F18-39

8681

Passing Analysis

Category:
Athletes Passed
1761
Passed By
444
Net Change
+1317
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24759
5K → 10K43557+378#24759#24381
10K → 15K32734+293#24381#24088
15K → 20K24131+210#24088#23878
20K → Half1755-38#23878#23916
Half → 25K15127+124#23916#23792
25K → 30K109100+9#23792#23783
30K → 20M13010+120#23783#23663
20M → 21M4834+14#23663#23649
21M → 35K3017+13#23649#23636
35K → 23M9317+76#23636#23560
23M → 24M2343-20#23560#23580
24M → 40K4510+35#23580#23545
40K → 25.2M374+33#23545#23512
25.2M → Finish755+70#23512#23442
TOTALS1761444+1317
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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