Boston Marathon logo
BOSTON MARATHON 2023

Rachel Berkowsky

Bib: 29117•F

CT

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
30:01
Rank: #22548
Start → 5K
9:40/mi
30:01 split
10K· 6.21 mi
57:36
Rank: #21637 (+911)
5K → 10K
8:53/mi
27:35 split
15K· 9.32 mi
1:23:53
Rank: #20574 (+1063)
10K → 15K
8:28/mi
26:17 split
20K· 12.43 mi
1:50:17
Rank: #19728 (+846)
15K → 20K
8:30/mi
26:24 split
Half· 13.11 mi
1:56:14
Rank: #19702 (+26)
20K → Half
8:43/mi
5:57 split
25K· 15.53 mi
2:18:16
Rank: #19628 (+74)
Half → 25K
9:05/mi
22:02 split
30K· 18.64 mi
2:48:22
Rank: #19739 (-111)
25K → 30K
9:41/mi
30:06 split
20M
3:02:26
Rank: #19914 (-175)
30K → 20M
10:21/mi
14:04 split
21M
3:13:29
Rank: #20010 (-96)
20M → 21M
11:03/mi
11:03 split
35K· 21.75 mi
3:21:24
Rank: #20142 (-132)
21M → 35K
10:35/mi
7:55 split
23M
3:34:53
Rank: #20280 (-138)
35K → 23M
10:46/mi
13:29 split
24M
3:45:58
Rank: #20443 (-163)
23M → 24M
11:05/mi
11:05 split
40K· 24.85 mi
3:55:45
Rank: #20592 (-149)
24M → 40K
11:27/mi
9:47 split
25.2M
3:59:47
Rank: #20614 (-22)
40K → 25.2M
11:42/mi
4:02 split
Finish· 26.22 mi
4:09:25
Rank: #20587 (+27)
25.2M → Finish
9:27/mi
9:38 split

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
Time1:56:14
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time2:13:11
Pace10:10 /mi
📊Positive Split: 14.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:5430:019:4030:01
9:40
-
10K
6.21 mi12:19:2957:369:1627:35
8:53
-0:47
15K
9.32 mi12:45:461:23:539:0026:17
8:28
-0:25
20K
12.43 mi13:12:101:50:178:5226:24
8:30
+0:02
Half
13.11 mi13:18:071:56:148:525:57
8:43
+0:13
25K
15.53 mi13:40:092:18:168:5422:02
9:05
+0:22
30K
18.64 mi14:10:152:48:229:0230:06
9:41
+0:36
20M
20.00 mi14:24:193:02:269:0714:04
10:21
+0:40
21M
21.00 mi14:35:223:13:299:1311:03
11:03
+0:42
35K
21.75 mi14:43:173:21:249:167:55
10:35
-0:28
23M
23.00 mi14:56:463:34:539:2113:29
10:46
+0:11
24M
24.00 mi15:07:513:45:589:2511:05
11:05
+0:19
40K
24.85 mi15:17:383:55:459:299:47
11:27
+0:22
25.2M
25.20 mi15:21:403:59:479:314:02
11:42
+0:15
Finish
26.22 mi15:31:184:09:259:319:38
9:27
-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

8:28 /mi

Average Pace

9:31 /mi

Slowest Pace

11:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:15

43% of race

Time at Steady Pace

1:09:45

28% of race

Time at Slower Pace

1:11:25

29% of race

Average Pace: 9:31 /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 mi11:51:5430:019:4030:01
9:40
#22548
10K
6.21 mi12:19:2957:369:1627:35
8:53
#21637
15K
9.32 mi12:45:461:23:539:0026:17
8:28
#20574
20K
12.43 mi13:12:101:50:178:5226:24
8:30
#19728
Half
13.11 mi13:18:071:56:148:525:57
8:43
#19702
25K
15.53 mi13:40:092:18:168:5422:02
9:05
#19628
30K
18.64 mi14:10:152:48:229:0230:06
9:41
#19739
20M
20.00 mi14:24:193:02:269:0714:04
10:21
#19914
21M
21.00 mi14:35:223:13:299:1311:03
11:03
#20010
35K
21.75 mi14:43:173:21:249:167:55
10:35
#20142
23M
23.00 mi14:56:463:34:539:2113:29
10:46
#20280
24M
24.00 mi15:07:513:45:589:2511:05
11:05
#20443
40K
24.85 mi15:17:383:55:459:299:47
11:27
#20592
25.2M
25.20 mi15:21:403:59:479:314:02
11:42
#20614
Finish
26.22 mi15:31:184:09:259:319:38
9:27
#20587
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi225489158915817560(Top 66%)6252(Top 55%)6252(Top 128%)
10K6.21 mi3.10 mi21637+9118656+5028656+50220339(Top 76%)7893(Top 69%)7893(Top 162%)
15K9.32 mi3.11 mi20574+10638061+5958061+59517560(Top 66%)6252(Top 55%)6252(Top 128%)
20K12.43 mi3.11 mi19728+8467558+5037558+50316851(Top 63%)5855(Top 51%)5855(Top 120%)
Half13.11 mi0.68 mi19702+267536+227536+2219135(Top 72%)7177(Top 63%)7177(Top 147%)
25K15.53 mi2.42 mi19628+747501+357501+3519380(Top 73%)7359(Top 64%)7359(Top 151%)
30K18.64 mi3.11 mi19739-1117578-777578-7720115(Top 76%)7837(Top 69%)7837(Top 160%)
20M20.00 mi1.36 mi19914-1757691-1137691-11321407(Top 80%)8643(Top 76%)8643(Top 177%)
21M21.00 mi1.00 mi20010-967757-667757-6620936(Top 79%)8423(Top 74%)8423(Top 172%)
35K21.75 mi0.75 mi20142-1327841-847841-8422536(Top 85%)9339(Top 82%)9339(Top 191%)
23M23.00 mi1.25 mi20280-1387928-877928-8721912(Top 82%)9021(Top 79%)9021(Top 185%)
24M24.00 mi1.00 mi20443-1638032-1048032-10423198(Top 87%)9737(Top 85%)9737(Top 199%)
40K24.85 mi0.85 mi20592-1498128-968128-9623123(Top 87%)9724(Top 85%)9724(Top 199%)
25.2M25.20 mi0.35 mi20614-228144-168144-1621963(Top 82%)9106(Top 80%)9106(Top 186%)
Finish26.22 mi1.02 mi20587+278135+98135+919972(Top 75%)7985(Top 70%)7985(Top 163%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21stories
+97ft-345ft

Overall

17560

Females

6252

F18-39

6252

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

20339

Females

7893

F18-39

7893

10K→15K

6.2 - 9.3 mi

Top 66%
×3stories
+67ft-78ft

Overall

17560

Females

6252

F18-39

6252

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

16851

Females

5855

F18-39

5855

20K→Half

12.4 - 13.1 mi

Top 72%
×2stories
+19ft-37ft

Overall

19135

Females

7177

F18-39

7177

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

19380

Females

7359

F18-39

7359

25K→30K

15.5 - 18.6 mi

Top 76%
×9stories
+181ft-148ft

Overall

20115

Females

7837

F18-39

7837

30K→20M

18.6 - 20.0 mi

Top 80%
×5stories
+64ft-50ft

Overall

21407

Females

8643

F18-39

8643

20M→21M

20.0 - 21.0 mi

Top 79%
×8stories
+106ft-24ft

Overall

20936

Females

8423

F18-39

8423

21M→35K

21.0 - 21.8 mi

Top 85%
×7stories
+17ft-86ft

Overall

22536

Females

9339

F18-39

9339

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

21912

Females

9021

F18-39

9021

23M→24M

23.0 - 24.0 mi

Top 87%
×6stories
+12ft-82ft

Overall

23198

Females

9737

F18-39

9737

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

23123

Females

9724

F18-39

9724

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21963

Females

9106

F18-39

9106

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

19972

Females

7985

F18-39

7985

Passing Analysis

Category:
Athletes Passed
3408
Passed By
1447
Net Change
+1961
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22548
5K → 10K94029+911#22548#21637
10K → 15K10652+1063#21637#20574
15K → 20K8471+846#20574#19728
20K → Half4822+26#19728#19702
Half → 25K14672+74#19702#19628
25K → 30K135246-111#19628#19739
30K → 20M42217-175#19739#19914
20M → 21M52148-96#19914#20010
21M → 35K13145-132#20010#20142
35K → 23M35173-138#20142#20280
23M → 24M11174-163#20280#20443
24M → 40K10159-149#20443#20592
40K → 25.2M830-22#20592#20614
25.2M → Finish5629+27#20614#20587
TOTALS34081447+1961
📊

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