Boston Marathon logo
BOSTON MARATHON 2023

Leah Collins

Bib: 24600•F

MA

0:00
0:00
/ mi
Be the first to cheer!
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
32:09
Rank: #24355
Start → 5K
32:09 | 10:21/mi
10K· 6.21 mi
1:07:58
Rank: #25502 (-1147)
5K → 10K
35:49 | 11:32/mi
15K· 9.32 mi
1:46:55
Rank: #25957 (-455)
10K → 15K
38:57 | 12:32/mi
20K· 12.43 mi
2:27:47
Rank: #26087 (-130)
15K → 20K
40:52 | 13:09/mi
Half· 13.11 mi
2:36:06
Rank: #26086 (+1)
20K → Half
8:19 | 12:11/mi
25K· 15.53 mi
3:08:02
Rank: #26089 (-3)
Half → 25K
31:56 | 13:10/mi
30K· 18.64 mi
3:50:00
Rank: #26039 (+50)
25K → 30K
41:58 | 13:30/mi
20M
4:09:55
Rank: #26058 (-19)
30K → 20M
19:55 | 14:39/mi
21M
4:25:50
Rank: #26076 (-18)
20M → 21M
15:55 | 15:55/mi
35K· 21.75 mi
4:37:15
Rank: #26115 (-39)
21M → 35K
11:25 | 15:16/mi
23M
4:55:18
Rank: #26125 (-10)
35K → 23M
18:03 | 14:25/mi
24M
5:08:42
Rank: #26121 (+4)
23M → 24M
13:24 | 13:24/mi
40K· 24.85 mi
5:20:33
Rank: #26115 (+6)
24M → 40K
11:51 | 13:52/mi
25.2M
5:25:20
Rank: #26101 (+14)
40K → 25.2M
4:47 | 13:52/mi
Finish· 26.22 mi
5:37:41
Rank: #26085 (+16)
25.2M → Finish
12:21 | 12:07/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:36:06
Pace11:54 /mi
2nd Half
Distance13.11 mi
Time3:01:35
Pace13:51 /mi
📊Positive Split: 16.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:1932:0910:2132:09
10:21
-
10K
6.21 mi12:23:081:07:5810:5635:49
11:32
+1:11
15K
9.32 mi13:02:051:46:5511:2838:57
12:32
+1:00
20K
12.43 mi13:42:572:27:4711:5440:52
13:09
+0:37
Half
13.11 mi13:51:162:36:0611:548:19
12:11
-0:58
25K
15.53 mi14:23:123:08:0212:0631:56
13:10
+0:59
30K
18.64 mi15:05:103:50:0012:2041:58
13:30
+0:20
20M
20.00 mi15:25:054:09:5512:3019:55
14:39
+1:09
21M
21.00 mi15:41:004:25:5012:4015:55
15:55
+1:16
35K
21.75 mi15:52:254:37:1512:4511:25
15:16
-0:39
23M
23.00 mi16:10:284:55:1812:5018:03
14:25
-0:51
24M
24.00 mi16:23:525:08:4212:5213:24
13:24
-1:01
40K
24.85 mi16:35:435:20:3312:5411:51
13:52
+0:28
25.2M
25.20 mi16:40:305:25:2012:554:47
13:52
0:00
Finish
26.22 mi16:52:515:37:4112:5312:21
12:07
-1:45

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

10:21 /mi

Average Pace

12:53 /mi

Slowest Pace

15:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:35

38% of race

Time at Steady Pace

2:24:48

43% of race

Time at Slower Pace

1:05:18

19% of race

Average Pace: 12:53 /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 mi11:47:1932:0910:2132:09
10:21
#24355
10K
6.21 mi12:23:081:07:5810:5635:49
11:32
#25502
15K
9.32 mi13:02:051:46:5511:2838:57
12:32
#25957
20K
12.43 mi13:42:572:27:4711:5440:52
13:09
#26087
Half
13.11 mi13:51:162:36:0611:548:19
12:11
#26086
25K
15.53 mi14:23:123:08:0212:0631:56
13:10
#26089
30K
18.64 mi15:05:103:50:0012:2041:58
13:30
#26039
20M
20.00 mi15:25:054:09:5512:3019:55
14:39
#26058
21M
21.00 mi15:41:004:25:5012:4015:55
15:55
#26076
35K
21.75 mi15:52:254:37:1512:4511:25
15:16
#26115
23M
23.00 mi16:10:284:55:1812:5018:03
14:25
#26125
24M
24.00 mi16:23:525:08:4212:5213:24
13:24
#26121
40K
24.85 mi16:35:435:20:3312:5411:51
13:52
#26115
25.2M
25.20 mi16:40:305:25:2012:554:47
13:52
#26101
Finish
26.22 mi16:52:515:37:4112:5312:21
12:07
#26085
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24355100721007226335(Top 99%)11260(Top 99%)11260(Top 231%)
10K6.21 mi3.10 mi25502-114710740-66810740-66825987(Top 98%)11033(Top 97%)11033(Top 226%)
15K9.32 mi3.11 mi25957-45511016-27611016-27626335(Top 99%)11260(Top 99%)11260(Top 231%)
20K12.43 mi3.11 mi26087-13011097-8111097-8126297(Top 99%)11233(Top 98%)11233(Top 230%)
Half13.11 mi0.68 mi26086+111099-211099-225995(Top 98%)11057(Top 97%)11057(Top 226%)
25K15.53 mi2.42 mi26089-311097+211097+225960(Top 98%)11058(Top 97%)11058(Top 226%)
30K18.64 mi3.11 mi26039+5011078+1911078+1925749(Top 97%)10974(Top 96%)10974(Top 225%)
20M20.00 mi1.36 mi26058-1911092-1411092-1426171(Top 98%)11211(Top 98%)11211(Top 230%)
21M21.00 mi1.00 mi26076-1811109-1711109-1726194(Top 98%)11219(Top 98%)11219(Top 230%)
35K21.75 mi0.75 mi26115-3911134-2511134-2526454(Top 99%)11350(Top 99%)11350(Top 232%)
23M23.00 mi1.25 mi26125-1011141-711141-726083(Top 98%)11175(Top 98%)11175(Top 229%)
24M24.00 mi1.00 mi26121+4111411114125748(Top 97%)11046(Top 97%)11046(Top 226%)
40K24.85 mi0.85 mi26115+611142-111142-125610(Top 96%)10983(Top 96%)10983(Top 225%)
25.2M25.20 mi0.35 mi26101+1411136+611136+624926(Top 94%)10663(Top 93%)10663(Top 218%)
Finish26.22 mi1.02 mi26085+1611126+1011126+1025350(Top 95%)10845(Top 95%)10845(Top 222%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21stories
+97ft-345ft

Overall

26335

Females

11260

F18-39

11260

5K→10K

3.1 - 6.2 mi

Top 98%
×5stories
+79ft-138ft

Overall

25987

Females

11033

F18-39

11033

10K→15K

6.2 - 9.3 mi

Top 99%
×3stories
+67ft-78ft

Overall

26335

Females

11260

F18-39

11260

15K→20K

9.3 - 12.4 mi

Top 99%
×5stories
+106ft-86ft

Overall

26297

Females

11233

F18-39

11233

20K→Half

12.4 - 13.1 mi

Top 98%
×2stories
+19ft-37ft

Overall

25995

Females

11057

F18-39

11057

Half→25K

13.1 - 15.5 mi

Top 98%
×4stories
+66ft-88ft

Overall

25960

Females

11058

F18-39

11058

25K→30K

15.5 - 18.6 mi

Top 97%
×9stories
+181ft-148ft

Overall

25749

Females

10974

F18-39

10974

30K→20M

18.6 - 20.0 mi

Top 98%
×5stories
+64ft-50ft

Overall

26171

Females

11211

F18-39

11211

20M→21M

20.0 - 21.0 mi

Top 98%
×8stories
+106ft-24ft

Overall

26194

Females

11219

F18-39

11219

21M→35K

21.0 - 21.8 mi

Top 99%
×7stories
+17ft-86ft

Overall

26454

Females

11350

F18-39

11350

35K→23M

21.8 - 23.0 mi

Top 98%
×5stories
+23ft-63ft

Overall

26083

Females

11175

F18-39

11175

23M→24M

23.0 - 24.0 mi

Top 97%
×6stories
+12ft-82ft

Overall

25748

Females

11046

F18-39

11046

24M→40K

24.0 - 24.9 mi

Top 96%
×1story
+6ft-20ft

Overall

25610

Females

10983

F18-39

10983

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

24926

Females

10663

F18-39

10663

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2stories
+22ft-21ft

Overall

25350

Females

10845

F18-39

10845

Passing Analysis

Category:
Athletes Passed
242
Passed By
1972
Net Change
-1730
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24355
5K → 10K31150-1147#24355#25502
10K → 15K11466-455#25502#25957
15K → 20K8138-130#25957#26087
20K → Half98+1#26087#26086
Half → 25K3538-3#26086#26089
25K → 30K7222+50#26089#26039
30K → 20M1130-19#26039#26058
20M → 21M1331-18#26058#26076
21M → 35K746-39#26076#26115
35K → 23M1020-10#26115#26125
23M → 24M1410+4#26125#26121
24M → 40K1610+6#26121#26115
40K → 25.2M140+14#26115#26101
25.2M → Finish193+16#26101#26085
TOTALS2421972-1730
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing