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BOSTON MARATHON 2023

Jennifer Burrows

Bib: 15757•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 50%
Masters (Masters Women)
#0 / 6539
Top 40%
Division (F45-49)
#0 / 1817
Top 47%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:36/mi
26:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:35/mi
53:21
↑ 79↓ 1380.4%
15K· 9.32 mi
8:32/mi
1:19:53
↑ 67↓ 78
20K· 12.43 mi
8:29/mi
1:46:13
↑ 106↓ 860.1%
Half· 13.11 mi
8:33/mi
1:52:03
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:12:51
↑ 66↓ 880.2%
30K· 18.64 mi
8:48/mi
2:40:10
↑ 181↓ 1480.2%
20M
8:33/mi
2:51:47
↑ 64↓ 500.2%
21M
9:04/mi
3:00:51
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
3:07:13
↑ 17↓ 861.7%
23M
8:48/mi
3:18:14
↑ 23↓ 630.6%
24M
8:38/mi
3:26:52
↓ 821.3%
40K· 24.85 mi
8:43/mi
3:34:19
↓ 200.3%
25.2M
9:14/mi
3:37:30
↑ 13↓ 160.2%
Finish· 26.22 mi
8:21/mi
3:46:01
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:03
Pace8:33 /mi
2nd Half
Distance13.11 mi
Time1:53:58
Pace8:42 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:58:2226:428:3626:42
8:36
-
10K
6.21 mi11:25:0153:218:3526:39
8:35
-0:01
15K
9.32 mi11:51:331:19:538:3426:32
8:32
-0:03
20K
12.43 mi12:17:531:46:138:3326:20
8:29
-0:03
Half
13.11 mi12:23:431:52:038:335:50
8:33
+0:04
25K
15.53 mi12:44:312:12:518:3320:48
8:35
+0:02
30K
18.64 mi13:11:502:40:108:3627:19
8:48
+0:13
20M
20.00 mi13:23:272:51:478:3511:37
8:33
-0:15
21M
21.00 mi13:32:313:00:518:379:04
9:04
+0:31
35K
21.75 mi13:38:533:07:138:376:22
8:31
-0:33
23M
23.00 mi13:49:543:18:148:3711:01
8:48
+0:17
24M
24.00 mi13:58:323:26:528:378:38
8:38
-0:10
40K
24.85 mi14:05:593:34:198:377:27
8:43
+0:05
25.2M
25.20 mi14:09:103:37:308:383:11
9:14
+0:31
Finish
26.22 mi14:17:413:46:018:388:31
8:21
-0:53

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

8:21 /mi

Average Pace

8:38 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:42:50

99% of race

Time at Steady Pace

3:11

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:37 /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 mi10:58:2226:428:3626:42
8:36
#18195
10K
6.21 mi11:25:0153:218:3526:39
8:35
#18453
15K
9.32 mi11:51:331:19:538:3426:32
8:32
#18300
20K
12.43 mi12:17:531:46:138:3326:20
8:29
#17873
Half
13.11 mi12:23:431:52:038:335:50
8:33
#17870
25K
15.53 mi12:44:312:12:518:3320:48
8:35
#17636
30K
18.64 mi13:11:502:40:108:3627:19
8:48
#17303
20M
20.00 mi13:23:272:51:478:3511:37
8:33
#17065
21M
21.00 mi13:32:313:00:518:379:04
9:04
#16880
35K
21.75 mi13:38:533:07:138:376:22
8:31
#16807
23M
23.00 mi13:49:543:18:148:3711:01
8:48
#16690
24M
24.00 mi13:58:323:26:528:378:38
8:38
#16617
40K
24.85 mi14:05:593:34:198:377:27
8:43
#16534
25.2M
25.20 mi14:09:103:37:308:383:11
9:14
#16474
Finish
26.22 mi14:17:413:46:018:388:31
8:21
#16378
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi181956677667718080(Top 68%)6552(Top 57%)6552(Top 361%)
10K6.21 mi3.10 mi18453-2586796-1196796-11918719(Top 70%)6906(Top 60%)6906(Top 380%)
15K9.32 mi3.11 mi18300+1536689+1076689+10718080(Top 68%)6552(Top 57%)6552(Top 361%)
20K12.43 mi3.11 mi17873+4276450+2396450+23916712(Top 63%)5765(Top 50%)5765(Top 317%)
Half13.11 mi0.68 mi17870+36448+26448+218003(Top 68%)6467(Top 57%)6467(Top 356%)
25K15.53 mi2.42 mi17636+2346317+1316317+13116701(Top 63%)5835(Top 51%)5835(Top 321%)
30K18.64 mi3.11 mi17303+3336137+1806137+18016018(Top 60%)5511(Top 48%)5511(Top 303%)
20M20.00 mi1.36 mi17065+2386009+1286009+12813961(Top 52%)4395(Top 38%)4395(Top 242%)
21M21.00 mi1.00 mi16880+1855914+955914+9513833(Top 52%)4411(Top 39%)4411(Top 243%)
35K21.75 mi0.75 mi16807+735881+335881+3315421(Top 58%)5366(Top 47%)5366(Top 295%)
23M23.00 mi1.25 mi16690+1175841+405841+4015012(Top 56%)5183(Top 45%)5183(Top 285%)
24M24.00 mi1.00 mi16617+735815+265815+2615300(Top 57%)5412(Top 47%)5412(Top 298%)
40K24.85 mi0.85 mi16534+835785+305785+3014637(Top 55%)5111(Top 45%)5111(Top 281%)
25.2M25.20 mi0.35 mi16474+605762+235762+2313905(Top 52%)4716(Top 41%)4716(Top 260%)
Finish26.22 mi1.02 mi16378+965704+585704+5814489(Top 54%)4997(Top 44%)4997(Top 275%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

18080

Females

6552

F45-49

6552

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

18719

Females

6906

F45-49

6906

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

18080

Females

6552

F45-49

6552

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16712

Females

5765

F45-49

5765

20K→Half

12.4 - 13.1 mi

Top 68%
×2story building
+19ft-37ft

Overall

18003

Females

6467

F45-49

6467

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

16701

Females

5835

F45-49

5835

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

16018

Females

5511

F45-49

5511

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

13961

Females

4395

F45-49

4395

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

13833

Females

4411

F45-49

4411

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

15421

Females

5366

F45-49

5366

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

15012

Females

5183

F45-49

5183

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

15300

Females

5412

F45-49

5412

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

14637

Females

5111

F45-49

5111

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13905

Females

4716

F45-49

4716

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14489

Females

4997

F45-49

4997

Passing Analysis

Category:
Athletes Passed
2626
Passed By
809
Net Change
+1817
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18195
5K → 10K193451-258#18195#18453
10K → 15K264111+153#18453#18300
15K → 20K44922+427#18300#17873
20K → Half3330+3#17873#17870
Half → 25K25824+234#17870#17636
25K → 30K36633+333#17636#17303
30K → 20M2413+238#17303#17065
20M → 21M19611+185#17065#16880
21M → 35K8512+73#16880#16807
35K → 23M15437+117#16807#16690
23M → 24M10027+73#16690#16617
24M → 40K10118+83#16617#16534
40K → 25.2M677+60#16534#16474
25.2M → Finish11923+96#16474#16378
TOTALS2626809+1817
📊

Passing Visuals

Category:
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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