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BOSTON MARATHON 2024

Jaclyn Masucci

MA

Bib: 18122 F

0:00
0:00
/ mi
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Division (F18-39)
#0 / 4660
Race Day Weather
55°/45°F
scattered clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:00/mi
24:50
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:56/mi
49:28
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:58/mi
1:14:14
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:22/mi
1:40:14
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:22/mi
1:45:57
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:34/mi
2:09:09
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
12:00/mi
2:46:25
↑ 181↓ 1480.2%
138 ft elev
20M
13:49/mi
3:05:12
↑ 64↓ 500.2%
148 ft elev
21M
13:39/mi
3:18:51
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
13:19/mi
3:28:49
↑ 17↓ 861.7%
156 ft elev
23M
14:12/mi
3:46:36
↑ 23↓ 630.6%
116 ft elev
24M
14:38/mi
4:01:14
↓ 821.3%
34 ft elev
40K· 24.85 mi
14:42/mi
4:13:48
↓ 200.3%
20 ft elev
25.2M
15:57/mi
4:19:18
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
10:15/mi
4:29:45
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:45:578:05 /mi⚡ faster
2nd Half
2:43:4812:30 /mi+54.6%
Positive split — 54.6% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0524:508:0024:50
8:00
-
10K
6.21 mi11:40:4349:287:5824:38
7:56
-0:04
15K
9.32 mi12:05:291:14:147:5824:46
7:58
+0:02
20K
12.43 mi12:31:291:40:148:0426:00
8:22
+0:24
Half
13.11 mi12:37:121:45:578:055:43
8:22
0:00
25K
15.53 mi13:00:242:09:098:1923:12
9:34
+1:12
30K
18.64 mi13:37:402:46:258:5637:16
12:00
+2:26
20M
20.00 mi13:56:273:05:129:1618:47
13:49
+1:49
21M
21.00 mi14:10:063:18:519:2813:39
13:39
-0:10
35K
21.75 mi14:20:043:28:499:369:58
13:19
-0:20
23M
23.00 mi14:37:513:46:369:5117:47
14:12
+0:53
24M
24.00 mi14:52:294:01:1410:0314:38
14:38
+0:26
40K
24.85 mi15:05:034:13:4810:1312:34
14:42
+0:04
25.2M
25.20 mi15:10:334:19:1810:175:30
15:57
+1:15
Finish
26.22 mi15:21:004:29:4510:1810:27
10:15
-5:42

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

7:56 /mi

Average Pace

10:18 /mi

Slowest Pace

15:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

2:19:36

52% of race

Time at Steady Pace

47:14

18% of race

Time at Slower Pace

1:22:55

31% of race

Average Pace: 10:17 /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 mi11:16:0524:508:0024:50
8:00
#14621
10K
6.21 mi11:40:4349:287:5824:38
7:56
#14138
15K
9.32 mi12:05:291:14:147:5824:46
7:58
#13828
20K
12.43 mi12:31:291:40:148:0426:00
8:22
#13861
Half
13.11 mi12:37:121:45:578:055:43
8:22
#13906
25K
15.53 mi13:00:242:09:098:1923:12
9:34
#14728
30K
18.64 mi13:37:402:46:258:5637:16
12:00
#17019
20M
20.00 mi13:56:273:05:129:1618:47
13:49
#18154
21M
21.00 mi14:10:063:18:519:2813:39
13:39
#18482
35K
21.75 mi14:20:043:28:499:369:58
13:19
#18816
23M
23.00 mi14:37:513:46:369:5117:47
14:12
#19299
24M
24.00 mi14:52:294:01:1410:0314:38
14:38
#19712
40K
24.85 mi15:05:034:13:4810:1312:34
14:42
#20027
25.2M
25.20 mi15:10:334:19:1810:175:30
15:57
#20107
Finish
26.22 mi15:21:004:29:4510:1810:27
10:15
#20076
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi14621470547051327239643964
10K6.21 mi3.10 mi14138+4834427+2784427+2781368541614161
15K9.32 mi3.11 mi13828+3104248+1794248+1791327239643964
20K12.43 mi3.11 mi13861-334281-334281-331408844864486
Half13.11 mi0.68 mi13906-454310-294310-291498750515051
25K15.53 mi2.42 mi14728-8224835-5254835-5251777566996699
30K18.64 mi3.11 mi17019-22916269-14346269-14342192691199119
20M20.00 mi1.36 mi18154-11356949-6806949-680238041014410144
21M21.00 mi1.00 mi18482-3287142-1937142-1932183192109210
35K21.75 mi0.75 mi18816-3347345-2037345-203236331012410124
23M23.00 mi1.25 mi19299-4837618-2737618-273239941028510285
24M24.00 mi1.00 mi19712-4137857-2397857-239246501063010630
40K24.85 mi0.85 mi20027-3158041-1848041-184243101050010500
25.2M25.20 mi0.35 mi20107-808092-518092-51240171037210372
Finish26.22 mi1.02 mi20076+31809280921926981128112

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

13272

Females

3964

F18-39

3964

5K→10K

3.1 - 6.2 mi

Top 54%
×5story building
+79ft-138ft

Overall

13685

Females

4161

F18-39

4161

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

13272

Females

3964

F18-39

3964

15K→20K

9.3 - 12.4 mi

Top 55%
×5story building
+106ft-86ft

Overall

14088

Females

4486

F18-39

4486

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

14987

Females

5051

F18-39

5051

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

17775

Females

6699

F18-39

6699

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

21926

Females

9119

F18-39

9119

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

23804

Females

10144

F18-39

10144

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

21831

Females

9210

F18-39

9210

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

23633

Females

10124

F18-39

10124

35K→23M

21.8 - 23.0 mi

Top 94%
×5story building
+23ft-63ft

Overall

23994

Females

10285

F18-39

10285

23M→24M

23.0 - 24.0 mi

Top 96%
×6story building
+12ft-82ft

Overall

24650

Females

10630

F18-39

10630

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

24310

Females

10500

F18-39

10500

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

24017

Females

10372

F18-39

10372

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

19269

Females

8112

F18-39

8112

Passing Analysis

Category:
Athletes Passed
1509
Passed By
6964
Net Change
-5455
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14621
5K → 10K57895+483#14621#14138
10K → 15K39585+310#14138#13828
15K → 20K245278-33#13828#13861
20K → Half2772-45#13861#13906
Half → 25K66888-822#13906#14728
25K → 30K152306-2291#14728#17019
30K → 20M141149-1135#17019#18154
20M → 21M24352-328#18154#18482
21M → 35K15349-334#18482#18816
35K → 23M29512-483#18816#19299
23M → 24M16429-413#19299#19712
24M → 40K9324-315#19712#20027
40K → 25.2M1090-80#20027#20107
25.2M → Finish6635+31#20107#20076
TOTALS15096964-5455

Passing Charts

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