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BOSTON MARATHON 2025

Chunshi Zhu

Bib: 23776•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:20
Rank: #19773
Start → 5K
26:20 | 8:29/mi
10K· 6.21 mi
53:23
Rank: #20355 (-582)
5K → 10K
27:03 | 8:42/mi
15K· 9.32 mi
1:20:40
Rank: #20512 (-157)
10K → 15K
27:17 | 8:47/mi
20K· 12.43 mi
1:49:14
Rank: #20869 (-357)
15K → 20K
28:34 | 9:12/mi
Half· 13.11 mi
1:55:33
Rank: #20994 (-125)
20K → Half
6:19 | 9:16/mi
25K· 15.53 mi
2:19:16
Rank: #21412 (-418)
Half → 25K
23:43 | 9:47/mi
30K· 18.64 mi
2:51:24
Rank: #21727 (-315)
25K → 30K
32:08 | 10:21/mi
20M
3:06:02
Rank: #21878 (-151)
30K → 20M
14:38 | 10:46/mi
21M
3:17:32
Rank: #21933 (-55)
20M → 21M
11:30 | 11:30/mi
35K· 21.75 mi
3:25:00
Rank: #21922 (+11)
21M → 35K
7:28 | 9:59/mi
23M
3:38:10
Rank: #21908 (+14)
35K → 23M
13:10 | 10:31/mi
24M
3:48:03
Rank: #21862 (+46)
23M → 24M
9:53 | 9:53/mi
40K· 24.85 mi
3:56:36
Rank: #21803 (+59)
24M → 40K
8:33 | 10:00/mi
25.2M
4:00:36
Rank: #21808 (-5)
40K → 25.2M
4:00 | 11:36/mi
Finish· 26.22 mi
4:10:43
Rank: #21823 (-15)
25.2M → Finish
10:07 | 9:56/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:33
Pace8:49 /mi
2nd Half
Distance13.11 mi
Time2:15:10
Pace10:19 /mi
📊Positive Split: 17.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4926:208:2926:20
8:29
-
10K
6.21 mi11:52:5253:238:3527:03
8:42
+0:13
15K
9.32 mi12:20:091:20:408:3927:17
8:47
+0:05
20K
12.43 mi12:48:431:49:148:4728:34
9:12
+0:25
Half
13.11 mi12:55:021:55:338:496:19
9:16
+0:04
25K
15.53 mi13:18:452:19:168:5823:43
9:47
+0:31
30K
18.64 mi13:50:532:51:249:1232:08
10:21
+0:34
20M
20.00 mi14:05:313:06:029:1814:38
10:46
+0:25
21M
21.00 mi14:17:013:17:329:2411:30
11:30
+0:44
35K
21.75 mi14:24:293:25:009:267:28
9:59
-1:31
23M
23.00 mi14:37:393:38:109:2913:10
10:31
+0:32
24M
24.00 mi14:47:323:48:039:309:53
9:53
-0:38
40K
24.85 mi14:56:053:56:369:318:33
10:00
+0:07
25.2M
25.20 mi15:00:054:00:369:334:00
11:36
+1:36
Finish
26.22 mi15:10:124:10:439:3410:07
9:56
-1:40

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

8:29 /mi

Average Pace

9:34 /mi

Slowest Pace

11:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:33

46% of race

Time at Steady Pace

1:31:52

37% of race

Time at Slower Pace

43:18

17% of race

Average Pace: 9:34 /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 mi11:25:4926:208:2926:20
8:29
#19773
10K
6.21 mi11:52:5253:238:3527:03
8:42
#20355
15K
9.32 mi12:20:091:20:408:3927:17
8:47
#20512
20K
12.43 mi12:48:431:49:148:4728:34
9:12
#20869
Half
13.11 mi12:55:021:55:338:496:19
9:16
#20994
25K
15.53 mi13:18:452:19:168:5823:43
9:47
#21412
30K
18.64 mi13:50:532:51:249:1232:08
10:21
#21727
20M
20.00 mi14:05:313:06:029:1814:38
10:46
#21878
21M
21.00 mi14:17:013:17:329:2411:30
11:30
#21933
35K
21.75 mi14:24:293:25:009:267:28
9:59
#21922
23M
23.00 mi14:37:393:38:109:2913:10
10:31
#21908
24M
24.00 mi14:47:323:48:039:309:53
9:53
#21862
40K
24.85 mi14:56:053:56:369:318:33
10:00
#21803
25.2M
25.20 mi15:00:054:00:369:334:00
11:36
#21808
Finish
26.22 mi15:10:124:10:439:3410:07
9:56
#21823
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi197737378737820949(Top 74%)7976(Top 65%)7976(Top 612%)
10K6.21 mi3.10 mi20355-5827686-3087686-30820923(Top 74%)7985(Top 65%)7985(Top 613%)
15K9.32 mi3.11 mi20512-1577758-727758-7220949(Top 74%)7976(Top 65%)7976(Top 612%)
20K12.43 mi3.11 mi20869-3577963-2057963-20521880(Top 77%)8525(Top 70%)8525(Top 654%)
Half13.11 mi0.68 mi20994-1258026-638026-6322827(Top 80%)9043(Top 74%)9043(Top 694%)
25K15.53 mi2.42 mi21412-4188277-2518277-25122723(Top 80%)9044(Top 74%)9044(Top 694%)
30K18.64 mi3.11 mi21727-3158470-1938470-19322580(Top 79%)9094(Top 74%)9094(Top 698%)
20M20.00 mi1.36 mi21878-1518566-968566-9623113(Top 81%)9475(Top 77%)9475(Top 727%)
21M21.00 mi1.00 mi21933-558629-638629-6322619(Top 80%)9308(Top 76%)9308(Top 714%)
35K21.75 mi0.75 mi21922+118637-88637-821858(Top 77%)8966(Top 73%)8966(Top 688%)
23M23.00 mi1.25 mi21908+148665-288665-2822064(Top 78%)9100(Top 74%)9100(Top 698%)
24M24.00 mi1.00 mi21862+468664+18664+121020(Top 74%)8613(Top 70%)8613(Top 661%)
40K24.85 mi0.85 mi21803+598655+98655+920476(Top 72%)8396(Top 69%)8396(Top 644%)
25.2M25.20 mi0.35 mi21808-58660-58660-522330(Top 79%)9313(Top 76%)9313(Top 715%)
Finish26.22 mi1.02 mi21823-158685-258685-2522713(Top 80%)9525(Top 78%)9525(Top 731%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

20949

Females

7976

F50-54

7976

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

20923

Females

7985

F50-54

7985

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

20949

Females

7976

F50-54

7976

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

21880

Females

8525

F50-54

8525

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

22827

Females

9043

F50-54

9043

Half→25K

13.1 - 15.5 mi

Top 80%
×4stories
+66ft-88ft

Overall

22723

Females

9044

F50-54

9044

25K→30K

15.5 - 18.6 mi

Top 79%
×9stories
+181ft-148ft

Overall

22580

Females

9094

F50-54

9094

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

23113

Females

9475

F50-54

9475

20M→21M

20.0 - 21.0 mi

Top 80%
×8stories
+106ft-24ft

Overall

22619

Females

9308

F50-54

9308

21M→35K

21.0 - 21.8 mi

Top 77%
×7stories
+17ft-86ft

Overall

21858

Females

8966

F50-54

8966

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22064

Females

9100

F50-54

9100

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

21020

Females

8613

F50-54

8613

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20476

Females

8396

F50-54

8396

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22330

Females

9313

F50-54

9313

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

22713

Females

9525

F50-54

9525

Passing Analysis

Category:
Athletes Passed
936
Passed By
2986
Net Change
-2050
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19773
5K → 10K85667-582#19773#20355
10K → 15K132289-157#20355#20512
15K → 20K92449-357#20512#20869
20K → Half11136-125#20869#20994
Half → 25K56474-418#20994#21412
25K → 30K103418-315#21412#21727
30K → 20M50201-151#21727#21878
20M → 21M64119-55#21878#21933
21M → 35K4534+11#21933#21922
35K → 23M9076+14#21922#21908
23M → 24M7529+46#21908#21862
24M → 40K7718+59#21862#21803
40K → 25.2M2025-5#21803#21808
25.2M → Finish3651-15#21808#21823
TOTALS9362986-2050
📊

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