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BOSTON MARATHON 2024

Chunfang Shen

Bib: 19519•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Top 45%
Masters (Masters Women)
#0 / 6263
Top 35%
Division (F45-49)
#0 / 1753
Top 44%
Race Day Weather
55°/45°F
scattered clouds

⏱️ 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
8:11/mi
25:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:05/mi
50:34
↑ 79↓ 1380.4%
15K· 9.32 mi
8:20/mi
1:16:27
↑ 67↓ 78
20K· 12.43 mi
8:48/mi
1:43:47
↑ 106↓ 860.1%
Half· 13.11 mi
8:56/mi
1:49:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:44/mi
2:11:03
↑ 66↓ 880.2%
30K· 18.64 mi
9:16/mi
2:39:51
↑ 181↓ 1480.2%
20M
9:43/mi
2:53:03
↑ 64↓ 500.2%
21M
9:44/mi
3:02:47
↑ 106↓ 241.6%
35K· 21.75 mi
9:16/mi
3:09:43
↑ 17↓ 861.7%
23M
8:52/mi
3:20:49
↑ 23↓ 630.6%
24M
9:12/mi
3:30:01
↓ 821.3%
40K· 24.85 mi
8:49/mi
3:37:33
↓ 200.3%
25.2M
9:46/mi
3:40:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:47/mi
3:49:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:53
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:59:59
Pace9:09 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5325:268:1125:26
8:11
-
10K
6.21 mi11:43:0150:348:0825:08
8:05
-0:06
15K
9.32 mi12:08:541:16:278:1225:53
8:20
+0:15
20K
12.43 mi12:36:141:43:478:2127:20
8:48
+0:28
Half
13.11 mi12:42:201:49:538:236:06
8:56
+0:08
25K
15.53 mi13:03:302:11:038:2621:10
8:44
-0:12
30K
18.64 mi13:32:182:39:518:3528:48
9:16
+0:32
20M
20.00 mi13:45:302:53:038:3913:12
9:43
+0:27
21M
21.00 mi13:55:143:02:478:429:44
9:44
+0:01
35K
21.75 mi14:02:103:09:438:436:56
9:16
-0:28
23M
23.00 mi14:13:163:20:498:4411:06
8:52
-0:24
24M
24.00 mi14:22:283:30:018:459:12
9:12
+0:20
40K
24.85 mi14:30:003:37:338:457:32
8:49
-0:23
25.2M
25.20 mi14:33:223:40:558:463:22
9:46
+0:57
Finish
26.22 mi14:42:193:49:528:468:57
8:47
-0:59

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

8:05 /mi

Average Pace

8:46 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:27

33% of race

Time at Steady Pace

1:22:11

36% of race

Time at Slower Pace

1:11:14

31% of race

Average Pace: 8:46 /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 mi11:17:5325:268:1125:26
8:11
#15954
10K
6.21 mi11:43:0150:348:0825:08
8:05
#15382
15K
9.32 mi12:08:541:16:278:1225:53
8:20
#15369
20K
12.43 mi12:36:141:43:478:2127:20
8:48
#15568
Half
13.11 mi12:42:201:49:538:236:06
8:56
#15708
25K
15.53 mi13:03:302:11:038:2621:10
8:44
#15423
30K
18.64 mi13:32:182:39:518:3528:48
9:16
#15221
20M
20.00 mi13:45:302:53:038:3913:12
9:43
#15255
21M
21.00 mi13:55:143:02:478:429:44
9:44
#15043
35K
21.75 mi14:02:103:09:438:436:56
9:16
#15023
23M
23.00 mi14:13:163:20:498:4411:06
8:52
#14725
24M
24.00 mi14:22:283:30:018:459:12
9:12
#14606
40K
24.85 mi14:30:003:37:338:457:32
8:49
#14404
25.2M
25.20 mi14:33:223:40:558:463:22
9:46
#14318
Finish
26.22 mi14:42:193:49:528:468:57
8:47
#14240
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi159545535553515457(Top 60%)5238(Top 48%)5238(Top 299%)
10K6.21 mi3.10 mi15382+5725174+3615174+36114808(Top 58%)4817(Top 44%)4817(Top 275%)
15K9.32 mi3.11 mi15369+135170+45170+415457(Top 60%)5238(Top 48%)5238(Top 299%)
20K12.43 mi3.11 mi15568-1995308-1385308-13816380(Top 64%)5812(Top 53%)5812(Top 332%)
Half13.11 mi0.68 mi15708-1405398-905398-9017995(Top 70%)6775(Top 62%)6775(Top 386%)
25K15.53 mi2.42 mi15423+2855256+1425256+14214228(Top 56%)4730(Top 43%)4730(Top 270%)
30K18.64 mi3.11 mi15221+2025215+415215+4114497(Top 57%)5143(Top 47%)5143(Top 293%)
20M20.00 mi1.36 mi15255-345277-625277-6215406(Top 60%)5902(Top 54%)5902(Top 337%)
21M21.00 mi1.00 mi15043+2125201+765201+7611872(Top 46%)4197(Top 38%)4197(Top 239%)
35K21.75 mi0.75 mi15023+205214-135214-1314583(Top 57%)5628(Top 52%)5628(Top 321%)
23M23.00 mi1.25 mi14725+2985105+1095105+10910501(Top 41%)3666(Top 34%)3666(Top 209%)
24M24.00 mi1.00 mi14606+1195083+225083+2213120(Top 51%)4986(Top 46%)4986(Top 284%)
40K24.85 mi0.85 mi14404+2025002+815002+819985(Top 39%)3574(Top 33%)3574(Top 204%)
25.2M25.20 mi0.35 mi14318+864966+364966+369994(Top 39%)3638(Top 33%)3638(Top 208%)
Finish26.22 mi1.02 mi14240+784951+154951+1513083(Top 51%)5016(Top 46%)5016(Top 286%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

15457

Females

5238

F45-49

5238

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

14808

Females

4817

F45-49

4817

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

15457

Females

5238

F45-49

5238

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

16380

Females

5812

F45-49

5812

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

17995

Females

6775

F45-49

6775

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

14228

Females

4730

F45-49

4730

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

14497

Females

5143

F45-49

5143

30K→20M

18.6 - 20.0 mi

Top 60%
×5story building
+64ft-50ft

Overall

15406

Females

5902

F45-49

5902

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

11872

Females

4197

F45-49

4197

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

14583

Females

5628

F45-49

5628

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

10501

Females

3666

F45-49

3666

23M→24M

23.0 - 24.0 mi

Top 51%
×6story building
+12ft-82ft

Overall

13120

Females

4986

F45-49

4986

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

9985

Females

3574

F45-49

3574

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

9994

Females

3638

F45-49

3638

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

13083

Females

5016

F45-49

5016

Passing Analysis

Category:
Athletes Passed
3107
Passed By
1393
Net Change
+1714
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15954
5K → 10K65987+572#15954#15382
10K → 15K238225+13#15382#15369
15K → 20K175374-199#15369#15568
20K → Half10150-140#15568#15708
Half → 25K36479+285#15708#15423
25K → 30K355153+202#15423#15221
30K → 20M106140-34#15221#15255
20M → 21M24129+212#15255#15043
21M → 35K7353+20#15043#15023
35K → 23M31214+298#15023#14725
23M → 24M15435+119#14725#14606
24M → 40K2108+202#14606#14404
40K → 25.2M904+86#14404#14318
25.2M → Finish12042+78#14318#14240
TOTALS31071393+1714
📊

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