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BOSTON MARATHON 2024

Shuo Fen Chang

Bib: 21172•F

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:23
Rank: #17740
Start → 5K
26:23 | 8:30/mi
10K· 6.21 mi
53:29
Rank: #18129 (-389)
5K → 10K
27:06 | 8:43/mi
15K· 9.32 mi
1:21:34
Rank: #18455 (-326)
10K → 15K
28:05 | 9:02/mi
20K· 12.43 mi
1:50:30
Rank: #18453 (+2)
15K → 20K
28:56 | 9:19/mi
Half· 13.11 mi
1:57:09
Rank: #18624 (-171)
20K → Half
6:39 | 9:45/mi
25K· 15.53 mi
2:20:12
Rank: #18420 (+204)
Half → 25K
23:03 | 9:30/mi
30K· 18.64 mi
2:50:48
Rank: #18097 (+323)
25K → 30K
30:36 | 9:51/mi
20M
3:03:58
Rank: #17880 (+217)
30K → 20M
13:10 | 9:41/mi
21M
3:14:28
Rank: #17699 (+181)
20M → 21M
10:30 | 10:30/mi
35K· 21.75 mi
3:21:21
Rank: #17561 (+138)
21M → 35K
6:53 | 9:12/mi
23M
3:33:03
Rank: #17282 (+279)
35K → 23M
11:42 | 9:21/mi
24M
3:42:03
Rank: #17069 (+213)
23M → 24M
9:00 | 9:00/mi
40K· 24.85 mi
3:50:05
Rank: #16881 (+188)
24M → 40K
8:02 | 9:24/mi
25.2M
3:53:41
Rank: #16787 (+94)
40K → 25.2M
3:36 | 10:26/mi
Finish· 26.22 mi
4:03:01
Rank: #16692 (+95)
25.2M → Finish
9:20 | 9:10/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:09
Pace8:56 /mi
2nd Half
Distance13.11 mi
Time2:05:52
Pace9:36 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:2726:238:3026:23
8:30
-
10K
6.21 mi11:50:3353:298:3627:06
8:43
+0:13
15K
9.32 mi12:18:381:21:348:4528:05
9:02
+0:19
20K
12.43 mi12:47:341:50:308:5328:56
9:19
+0:17
Half
13.11 mi12:54:131:57:098:566:39
9:45
+0:26
25K
15.53 mi13:17:162:20:129:0223:03
9:30
-0:15
30K
18.64 mi13:47:522:50:489:1030:36
9:51
+0:21
20M
20.00 mi14:01:023:03:589:1213:10
9:41
-0:10
21M
21.00 mi14:11:323:14:289:1610:30
10:30
+0:49
35K
21.75 mi14:18:253:21:219:156:53
9:12
-1:18
23M
23.00 mi14:30:073:33:039:1611:42
9:21
+0:09
24M
24.00 mi14:39:073:42:039:159:00
9:00
-0:21
40K
24.85 mi14:47:093:50:059:158:02
9:24
+0:24
25.2M
25.20 mi14:50:453:53:419:163:36
10:26
+1:02
Finish
26.22 mi15:00:054:03:019:179:20
9:10
-1:16

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

8:30 /mi

Average Pace

9:17 /mi

Slowest Pace

10:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:34

37% of race

Time at Steady Pace

1:27:56

36% of race

Time at Slower Pace

1:04:31

27% of race

Average Pace: 9:16 /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 mi11:23:2726:238:3026:23
8:30
#17740
10K
6.21 mi11:50:3353:298:3627:06
8:43
#18129
15K
9.32 mi12:18:381:21:348:4528:05
9:02
#18455
20K
12.43 mi12:47:341:50:308:5328:56
9:19
#18453
Half
13.11 mi12:54:131:57:098:566:39
9:45
#18624
25K
15.53 mi13:17:162:20:129:0223:03
9:30
#18420
30K
18.64 mi13:47:522:50:489:1030:36
9:51
#18097
20M
20.00 mi14:01:023:03:589:1213:10
9:41
#17880
21M
21.00 mi14:11:323:14:289:1610:30
10:30
#17699
35K
21.75 mi14:18:253:21:219:156:53
9:12
#17561
23M
23.00 mi14:30:073:33:039:1611:42
9:21
#17282
24M
24.00 mi14:39:073:42:039:159:00
9:00
#17069
40K
24.85 mi14:47:093:50:059:158:02
9:24
#16881
25.2M
25.20 mi14:50:453:53:419:163:36
10:26
#16787
Finish
26.22 mi15:00:054:03:019:179:20
9:10
#16692
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi177406606660619081(Top 75%)7288(Top 67%)7288(Top 416%)
10K6.21 mi3.10 mi18129-3896817-2116817-21118486(Top 72%)7012(Top 64%)7012(Top 400%)
15K9.32 mi3.11 mi18455-3266999-1826999-18219081(Top 75%)7288(Top 67%)7288(Top 416%)
20K12.43 mi3.11 mi18453+26987+126987+1218592(Top 73%)7046(Top 65%)7046(Top 402%)
Half13.11 mi0.68 mi18624-1717084-977084-9720802(Top 81%)8291(Top 76%)8291(Top 473%)
25K15.53 mi2.42 mi18420+2046998+866998+8617586(Top 69%)6580(Top 60%)6580(Top 375%)
30K18.64 mi3.11 mi18097+3236889+1096889+10916825(Top 66%)6409(Top 59%)6409(Top 366%)
20M20.00 mi1.36 mi17880+2176793+966793+9615322(Top 60%)5855(Top 54%)5855(Top 334%)
21M21.00 mi1.00 mi17699+1816725+686725+6814845(Top 58%)5751(Top 53%)5751(Top 328%)
35K21.75 mi0.75 mi17561+1386661+646661+6414296(Top 56%)5492(Top 50%)5492(Top 313%)
23M23.00 mi1.25 mi17282+2796524+1376524+13712828(Top 50%)4827(Top 44%)4827(Top 275%)
24M24.00 mi1.00 mi17069+2136434+906434+9012211(Top 48%)4536(Top 42%)4536(Top 259%)
40K24.85 mi0.85 mi16881+1886371+636371+6312736(Top 50%)4923(Top 45%)4923(Top 281%)
25.2M25.20 mi0.35 mi16787+946329+426329+4212660(Top 50%)4949(Top 45%)4949(Top 282%)
Finish26.22 mi1.02 mi16692+956302+276302+2714984(Top 59%)5972(Top 55%)5972(Top 341%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

19081

Females

7288

F45-49

7288

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

18486

Females

7012

F45-49

7012

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

19081

Females

7288

F45-49

7288

15K→20K

9.3 - 12.4 mi

Top 73%
×5stories
+106ft-86ft

Overall

18592

Females

7046

F45-49

7046

20K→Half

12.4 - 13.1 mi

Top 81%
×2stories
+19ft-37ft

Overall

20802

Females

8291

F45-49

8291

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

17586

Females

6580

F45-49

6580

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

16825

Females

6409

F45-49

6409

30K→20M

18.6 - 20.0 mi

Top 60%
×5stories
+64ft-50ft

Overall

15322

Females

5855

F45-49

5855

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

14845

Females

5751

F45-49

5751

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

14296

Females

5492

F45-49

5492

35K→23M

21.8 - 23.0 mi

Top 50%
×5stories
+23ft-63ft

Overall

12828

Females

4827

F45-49

4827

23M→24M

23.0 - 24.0 mi

Top 48%
×6stories
+12ft-82ft

Overall

12211

Females

4536

F45-49

4536

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

12736

Females

4923

F45-49

4923

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

12660

Females

4949

F45-49

4949

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2stories
+22ft-21ft

Overall

14984

Females

5972

F45-49

5972

Passing Analysis

Category:
Athletes Passed
2776
Passed By
1728
Net Change
+1048
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17740
5K → 10K139528-389#17740#18129
10K → 15K129455-326#18129#18455
15K → 20K260258+2#18455#18453
20K → Half15186-171#18453#18624
Half → 25K312108+204#18624#18420
25K → 30K41895+323#18420#18097
30K → 20M22811+217#18097#17880
20M → 21M20524+181#17880#17699
21M → 35K1479+138#17699#17561
35K → 23M2834+279#17561#17282
23M → 24M2207+213#17282#17069
24M → 40K19911+188#17069#16881
40K → 25.2M1006+94#16881#16787
25.2M → Finish12126+95#16787#16692
TOTALS27761728+1048
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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