Boston Marathon logo
BOSTON MARATHON 2023

Jennifer Zysk

Bib: 27127•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
29:02
Rank: #21669
Start → 5K
9:21/mi
29:02 split
10K· 6.21 mi
57:16
Rank: #21459 (+210)
5K → 10K
9:05/mi
28:14 split
15K· 9.32 mi
1:25:34
Rank: #21295 (+164)
10K → 15K
9:07/mi
28:18 split
20K· 12.43 mi
1:54:13
Rank: #21160 (+135)
15K → 20K
9:13/mi
28:39 split
Half· 13.11 mi
2:00:25
Rank: #21139 (+21)
20K → Half
9:05/mi
6:12 split
25K· 15.53 mi
2:22:44
Rank: #20893 (+246)
Half → 25K
9:12/mi
22:19 split
30K· 18.64 mi
2:53:11
Rank: #20791 (+102)
25K → 30K
9:48/mi
30:27 split
20M
3:06:33
Rank: #20696 (+95)
30K → 20M
9:50/mi
13:22 split
21M
3:17:02
Rank: #20624 (+72)
20M → 21M
10:29/mi
10:29 split
35K· 21.75 mi
3:24:04
Rank: #20576 (+48)
21M → 35K
9:24/mi
7:02 split
23M
3:36:28
Rank: #20503 (+73)
35K → 23M
9:54/mi
12:24 split
24M
3:46:08
Rank: #20469 (+34)
23M → 24M
9:40/mi
9:40 split
40K· 24.85 mi
3:54:38
Rank: #20427 (+42)
24M → 40K
9:56/mi
8:30 split
25.2M
3:58:16
Rank: #20399 (+28)
40K → 25.2M
10:32/mi
3:38 split
Finish· 26.22 mi
4:08:21
Rank: #20439 (-40)
25.2M → Finish
9:54/mi
10:05 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
Time2:00:25
Pace9:11 /mi
2nd Half
Distance13.11 mi
Time2:07:56
Pace9:46 /mi
📊Positive Split: 6.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1729:029:2129:02
9:21
-
10K
6.21 mi12:14:3157:169:1328:14
9:05
-0:16
15K
9.32 mi12:42:491:25:349:1128:18
9:07
+0:02
20K
12.43 mi13:11:281:54:139:1128:39
9:13
+0:06
Half
13.11 mi13:17:402:00:259:116:12
9:05
-0:08
25K
15.53 mi13:39:592:22:449:1122:19
9:12
+0:07
30K
18.64 mi14:10:262:53:119:1730:27
9:48
+0:36
20M
20.00 mi14:23:483:06:339:2013:22
9:50
+0:02
21M
21.00 mi14:34:173:17:029:2310:29
10:29
+0:39
35K
21.75 mi14:41:193:24:049:237:02
9:24
-1:05
23M
23.00 mi14:53:433:36:289:2512:24
9:54
+0:30
24M
24.00 mi15:03:233:46:089:259:40
9:40
-0:14
40K
24.85 mi15:11:533:54:389:268:30
9:56
+0:16
25.2M
25.20 mi15:15:313:58:169:273:38
10:32
+0:36
Finish
26.22 mi15:25:364:08:219:2910:05
9:54
-0:38

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

9:05 /mi

Average Pace

9:29 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:54:14

94% of race

Time at Steady Pace

14:07

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:28 /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 mi11:46:1729:029:2129:02
9:21
#21669
10K
6.21 mi12:14:3157:169:1328:14
9:05
#21459
15K
9.32 mi12:42:491:25:349:1128:18
9:07
#21295
20K
12.43 mi13:11:281:54:139:1128:39
9:13
#21160
Half
13.11 mi13:17:402:00:259:116:12
9:05
#21139
25K
15.53 mi13:39:592:22:449:1122:19
9:12
#20893
30K
18.64 mi14:10:262:53:119:1730:27
9:48
#20791
20M
20.00 mi14:23:483:06:339:2013:22
9:50
#20696
21M
21.00 mi14:34:173:17:029:2310:29
10:29
#20624
35K
21.75 mi14:41:193:24:049:237:02
9:24
#20576
23M
23.00 mi14:53:433:36:289:2512:24
9:54
#20503
24M
24.00 mi15:03:233:46:089:259:40
9:40
#20469
40K
24.85 mi15:11:533:54:389:268:30
9:56
#20427
25.2M
25.20 mi15:15:313:58:169:273:38
10:32
#20399
Finish
26.22 mi15:25:364:08:219:2910:05
9:54
#20439
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi216698728872820983(Top 79%)8226(Top 72%)8226(Top 168%)
10K6.21 mi3.10 mi21459+2108562+1668562+16621220(Top 80%)8396(Top 74%)8396(Top 172%)
15K9.32 mi3.11 mi21295+1648438+1248438+12420983(Top 79%)8226(Top 72%)8226(Top 168%)
20K12.43 mi3.11 mi21160+1358354+848354+8420665(Top 78%)8039(Top 70%)8039(Top 165%)
Half13.11 mi0.68 mi21139+218341+138341+1320814(Top 78%)8138(Top 71%)8138(Top 167%)
25K15.53 mi2.42 mi20893+2468199+1428199+14219877(Top 75%)7629(Top 67%)7629(Top 156%)
30K18.64 mi3.11 mi20791+1028154+458154+4520449(Top 77%)8023(Top 70%)8023(Top 164%)
20M20.00 mi1.36 mi20696+958126+288126+2819979(Top 75%)7840(Top 69%)7840(Top 161%)
21M21.00 mi1.00 mi20624+728094+328094+3219568(Top 74%)7686(Top 67%)7686(Top 157%)
35K21.75 mi0.75 mi20576+488079+158079+1519571(Top 74%)7696(Top 67%)7696(Top 158%)
23M23.00 mi1.25 mi20503+738056+238056+2319708(Top 74%)7804(Top 68%)7804(Top 160%)
24M24.00 mi1.00 mi20469+348046+108046+1019790(Top 74%)7861(Top 69%)7861(Top 161%)
40K24.85 mi0.85 mi20427+428024+228024+2219826(Top 74%)7961(Top 70%)7961(Top 163%)
25.2M25.20 mi0.35 mi20399+288018+68018+619261(Top 72%)7656(Top 67%)7656(Top 157%)
Finish26.22 mi1.02 mi20439-408051-338051-3321470(Top 81%)8826(Top 77%)8826(Top 181%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

20983

Females

8226

F18-39

8226

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

21220

Females

8396

F18-39

8396

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

20983

Females

8226

F18-39

8226

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

20665

Females

8039

F18-39

8039

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

20814

Females

8138

F18-39

8138

Half→25K

13.1 - 15.5 mi

Top 75%
×4story building
+66ft-88ft

Overall

19877

Females

7629

F18-39

7629

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

20449

Females

8023

F18-39

8023

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

19979

Females

7840

F18-39

7840

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

19568

Females

7686

F18-39

7686

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

19571

Females

7696

F18-39

7696

35K→23M

21.8 - 23.0 mi

Top 74%
×5story building
+23ft-63ft

Overall

19708

Females

7804

F18-39

7804

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

19790

Females

7861

F18-39

7861

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

19826

Females

7961

F18-39

7961

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19261

Females

7656

F18-39

7656

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

21470

Females

8826

F18-39

8826

Passing Analysis

Category:
Athletes Passed
1953
Passed By
723
Net Change
+1230
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21669
5K → 10K399189+210#21669#21459
10K → 15K26096+164#21459#21295
15K → 20K21075+135#21295#21160
20K → Half3514+21#21160#21139
Half → 25K26216+246#21139#20893
25K → 30K19694+102#20893#20791
30K → 20M12227+95#20791#20696
20M → 21M11139+72#20696#20624
21M → 35K6719+48#20624#20576
35K → 23M9825+73#20576#20503
23M → 24M6026+34#20503#20469
24M → 40K6725+42#20469#20427
40K → 25.2M368+28#20427#20399
25.2M → Finish3070-40#20399#20439
TOTALS1953723+1230
📊

Passing Visuals

Category:
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