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BOSTON MARATHON 2023

Kelly Brozowski

Bib: 16775•F

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 45%
Gender (Female)
#0 / 11423
Top 27%
Division (F18-39)
#0 / 4884
Top 45%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:03
Rank: #8999
Start → 5K
23:03 | 7:25/mi
10K· 6.21 mi
45:57
Rank: #9155 (-156)
5K → 10K
22:54 | 7:22/mi
15K· 9.32 mi
1:09:25
Rank: #9598 (-443)
10K → 15K
23:28 | 7:33/mi
20K· 12.43 mi
1:33:22
Rank: #9949 (-351)
15K → 20K
23:57 | 7:43/mi
Half· 13.11 mi
1:38:39
Rank: #10057 (-108)
20K → Half
5:17 | 7:45/mi
25K· 15.53 mi
1:57:59
Rank: #10445 (-388)
Half → 25K
19:20 | 7:58/mi
30K· 18.64 mi
2:23:40
Rank: #10841 (-396)
25K → 30K
25:41 | 8:16/mi
20M
2:35:20
Rank: #11072 (-231)
30K → 20M
11:40 | 8:35/mi
21M
2:44:39
Rank: #11332 (-260)
20M → 21M
9:19 | 9:19/mi
35K· 21.75 mi
2:50:41
Rank: #11375 (-43)
21M → 35K
6:02 | 8:04/mi
23M
3:01:30
Rank: #11573 (-198)
35K → 23M
10:49 | 8:38/mi
24M
3:10:03
Rank: #11740 (-167)
23M → 24M
8:33 | 8:33/mi
40K· 24.85 mi
3:17:24
Rank: #11820 (-80)
24M → 40K
7:21 | 8:36/mi
25.2M
3:20:35
Rank: #11860 (-40)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:28:55
Rank: #11934 (-74)
25.2M → Finish
8:20 | 8:11/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:39
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:50:16
Pace8:25 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:1823:037:2523:03
7:25
-
10K
6.21 mi11:36:1245:577:2422:54
7:22
-0:03
15K
9.32 mi11:59:401:09:257:2723:28
7:33
+0:11
20K
12.43 mi12:23:371:33:227:3123:57
7:43
+0:10
Half
13.11 mi12:28:541:38:397:315:17
7:45
+0:02
25K
15.53 mi12:48:141:57:597:3619:20
7:58
+0:13
30K
18.64 mi13:13:552:23:407:4225:41
8:16
+0:18
20M
20.00 mi13:25:352:35:207:4611:40
8:35
+0:19
21M
21.00 mi13:34:542:44:397:509:19
9:19
+0:44
35K
21.75 mi13:40:562:50:417:516:02
8:04
-1:15
23M
23.00 mi13:51:453:01:307:5310:49
8:38
+0:34
24M
24.00 mi14:00:183:10:037:558:33
8:33
-0:05
40K
24.85 mi14:07:393:17:247:577:21
8:36
+0:03
25.2M
25.20 mi14:10:503:20:357:583:11
9:14
+0:38
Finish
26.22 mi14:19:103:28:557:588:20
8:11
-1:03

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

7:22 /mi

Average Pace

7:58 /mi

Slowest Pace

9:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:39

47% of race

Time at Steady Pace

59:23

28% of race

Time at Slower Pace

50:53

24% of race

Average Pace: 7:58 /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 mi11:13:1823:037:2523:03
7:25
#8999
10K
6.21 mi11:36:1245:577:2422:54
7:22
#9155
15K
9.32 mi11:59:401:09:257:2723:28
7:33
#9598
20K
12.43 mi12:23:371:33:227:3123:57
7:43
#9949
Half
13.11 mi12:28:541:38:397:315:17
7:45
#10057
25K
15.53 mi12:48:141:57:597:3619:20
7:58
#10445
30K
18.64 mi13:13:552:23:407:4225:41
8:16
#10841
20M
20.00 mi13:25:352:35:207:4611:40
8:35
#11072
21M
21.00 mi13:34:542:44:397:509:19
9:19
#11332
35K
21.75 mi13:40:562:50:417:516:02
8:04
#11375
23M
23.00 mi13:51:453:01:307:5310:49
8:38
#11573
24M
24.00 mi14:00:183:10:037:558:33
8:33
#11740
40K
24.85 mi14:07:393:17:247:577:21
8:36
#11820
25.2M
25.20 mi14:10:503:20:357:583:11
9:14
#11860
Finish
26.22 mi14:19:103:28:557:588:20
8:11
#11934
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi89991398139810628(Top 40%)2153(Top 19%)2153(Top 44%)
10K6.21 mi3.10 mi9155-1561474-761474-769409(Top 35%)1592(Top 14%)1592(Top 33%)
15K9.32 mi3.11 mi9598-4431658-1841658-18410628(Top 40%)2153(Top 19%)2153(Top 44%)
20K12.43 mi3.11 mi9949-3511816-1581816-15811006(Top 41%)2410(Top 21%)2410(Top 49%)
Half13.11 mi0.68 mi10057-1081862-461862-4612290(Top 46%)3082(Top 27%)3082(Top 63%)
25K15.53 mi2.42 mi10445-3882071-2092071-20912530(Top 47%)3370(Top 30%)3370(Top 69%)
30K18.64 mi3.11 mi10841-3962320-2492320-24912803(Top 48%)3634(Top 32%)3634(Top 74%)
20M20.00 mi1.36 mi11072-2312476-1562476-15614160(Top 53%)4502(Top 39%)4502(Top 92%)
21M21.00 mi1.00 mi11332-2602637-1612637-16115075(Top 57%)5092(Top 45%)5092(Top 104%)
35K21.75 mi0.75 mi11375-432671-342671-3412588(Top 47%)3749(Top 33%)3749(Top 77%)
23M23.00 mi1.25 mi11573-1982811-1402811-14014017(Top 53%)4618(Top 40%)4618(Top 95%)
24M24.00 mi1.00 mi11740-1672918-1072918-10714773(Top 55%)5092(Top 45%)5092(Top 104%)
40K24.85 mi0.85 mi11820-802993-752993-7513940(Top 52%)4703(Top 41%)4703(Top 96%)
25.2M25.20 mi0.35 mi11860-403023-303023-3013822(Top 52%)4633(Top 41%)4633(Top 95%)
Finish26.22 mi1.02 mi11934-743085-623085-6213293(Top 50%)4352(Top 38%)4352(Top 89%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

10628

Females

2153

F18-39

2153

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

9409

Females

1592

F18-39

1592

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

10628

Females

2153

F18-39

2153

15K→20K

9.3 - 12.4 mi

Top 41%
×5stories
+106ft-86ft

Overall

11006

Females

2410

F18-39

2410

20K→Half

12.4 - 13.1 mi

Top 46%
×2stories
+19ft-37ft

Overall

12290

Females

3082

F18-39

3082

Half→25K

13.1 - 15.5 mi

Top 47%
×4stories
+66ft-88ft

Overall

12530

Females

3370

F18-39

3370

25K→30K

15.5 - 18.6 mi

Top 48%
×9stories
+181ft-148ft

Overall

12803

Females

3634

F18-39

3634

30K→20M

18.6 - 20.0 mi

Top 53%
×5stories
+64ft-50ft

Overall

14160

Females

4502

F18-39

4502

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

15075

Females

5092

F18-39

5092

21M→35K

21.0 - 21.8 mi

Top 47%
×7stories
+17ft-86ft

Overall

12588

Females

3749

F18-39

3749

35K→23M

21.8 - 23.0 mi

Top 53%
×5stories
+23ft-63ft

Overall

14017

Females

4618

F18-39

4618

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

14773

Females

5092

F18-39

5092

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13940

Females

4703

F18-39

4703

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13822

Females

4633

F18-39

4633

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2stories
+22ft-21ft

Overall

13293

Females

4352

F18-39

4352

Passing Analysis

Category:
Athletes Passed
735*
Passed By
3669
Net Change
-2935
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8999
5K → 10K208364-156#8999#9155
10K → 15K50493-443#9155#9598
15K → 20K71422-351#9598#9949
20K → Half5112-108#9949#10057
Half → 25K45433-388#10057#10445
25K → 30K77473-396#10445#10841
30K → 20M36*267-231#10841#11072
20M → 21M31291-260#11072#11332
21M → 35K3780-43#11332#11375
35K → 23M47245-198#11375#11573
23M → 24M25192-167#11573#11740
24M → 40K43123-80#11740#11820
40K → 25.2M1353-40#11820#11860
25.2M → Finish47121-74#11860#11934
TOTALS735*3669-2935

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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