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BOSTON MARATHON 2025

Chuan Zhu

MA

Bib: 29551 F

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

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
10:02/mi
31:11
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:32/mi
1:00:47
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:28/mi
1:30:13
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:36/mi
2:00:04
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:26/mi
2:06:30
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:49/mi
2:30:19
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
10:23/mi
3:02:35
↑ 181↓ 1480.2%
138 ft elev
20M
10:14/mi
3:16:30
↑ 64↓ 500.2%
148 ft elev
21M
10:21/mi
3:26:51
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:17/mi
3:33:48
↑ 17↓ 861.7%
156 ft elev
23M
9:42/mi
3:45:57
↑ 23↓ 630.6%
116 ft elev
24M
9:32/mi
3:55:29
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:41/mi
4:03:46
↓ 200.3%
20 ft elev
25.2M
10:09/mi
4:07:16
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:59/mi
4:16:25
↑ 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
2:06:309:39 /mi⚡ faster
2nd Half
2:09:559:55 /mi+2.7%
Positive split — 2.7% 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 mi11:50:2031:1110:0231:11
10:02
-
10K
6.21 mi12:19:561:00:479:4729:36
9:32
-0:30
15K
9.32 mi12:49:221:30:139:4129:26
9:28
-0:04
20K
12.43 mi13:19:132:00:049:4029:51
9:36
+0:08
Half
13.11 mi13:25:392:06:309:396:26
9:26
-0:10
25K
15.53 mi13:49:282:30:199:4123:49
9:49
+0:23
30K
18.64 mi14:21:443:02:359:4832:16
10:23
+0:34
20M
20.00 mi14:35:393:16:309:4913:55
10:14
-0:09
21M
21.00 mi14:46:003:26:519:5110:21
10:21
+0:07
35K
21.75 mi14:52:573:33:489:506:57
9:17
-1:04
23M
23.00 mi15:05:063:45:579:4912:09
9:42
+0:25
24M
24.00 mi15:14:383:55:299:499:32
9:32
-0:10
40K
24.85 mi15:22:554:03:469:488:17
9:41
+0:09
25.2M
25.20 mi15:26:254:07:169:493:30
10:09
+0:28
Finish
26.22 mi15:35:344:16:259:479:09
8:59
-1:10

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

8:59 /mi

Average Pace

9:47 /mi

Slowest Pace

10:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

2:45:12

64% of race

Time at Steady Pace

1:31:13

36% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:47 /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 mi11:50:2031:1110:0231:11
10:02
#25671
10K
6.21 mi12:19:561:00:479:4729:36
9:32
#24935
15K
9.32 mi12:49:221:30:139:4129:26
9:28
#24533
20K
12.43 mi13:19:132:00:049:4029:51
9:36
#24198
Half
13.11 mi13:25:392:06:309:396:26
9:26
#24159
25K
15.53 mi13:49:282:30:199:4123:49
9:49
#23921
30K
18.64 mi14:21:443:02:359:4832:16
10:23
#23652
20M
20.00 mi14:35:393:16:309:4913:55
10:14
#23505
21M
21.00 mi14:46:003:26:519:5110:21
10:21
#23289
35K
21.75 mi14:52:573:33:489:506:57
9:17
#23168
23M
23.00 mi15:05:063:45:579:4912:09
9:42
#22968
24M
24.00 mi15:14:383:55:299:499:32
9:32
#22817
40K
24.85 mi15:22:554:03:469:488:17
9:41
#22685
25.2M
25.20 mi15:26:254:07:169:493:30
10:09
#22638
Finish
26.22 mi15:35:344:16:259:479:09
8:59
#22521
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi2567110566105662367294729472
10K6.21 mi3.10 mi24935+73610193+37310193+3732417997899789
15K9.32 mi3.11 mi24533+4029974+2199974+2192367294729472
20K12.43 mi3.11 mi24198+3359801+1739801+1732323892689268
Half13.11 mi0.68 mi24159+399783+189783+182336693529352
25K15.53 mi2.42 mi23921+2389654+1299654+1292282791059105
30K18.64 mi3.11 mi23652+2699542+1129542+1122267491439143
20M20.00 mi1.36 mi23505+1479475+679475+672170087368736
21M21.00 mi1.00 mi23289+2169382+939382+931957676777677
35K21.75 mi0.75 mi23168+1219321+619321+611957377657765
23M23.00 mi1.25 mi22968+2009242+799242+791948877837783
24M24.00 mi1.00 mi22817+1519184+589184+581976579727972
40K24.85 mi0.85 mi22685+1329128+569128+561946678827882
25.2M25.20 mi0.35 mi22638+479122+69122+61779270447044
Finish26.22 mi1.02 mi22521+1179071+519071+511896375847584

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21story building
+97ft-345ft

Overall

23672

Females

9472

F50-54

9472

5K→10K

3.1 - 6.2 mi

Top 85%
×5story building
+79ft-138ft

Overall

24179

Females

9789

F50-54

9789

10K→15K

6.2 - 9.3 mi

Top 83%
×3story building
+67ft-78ft

Overall

23672

Females

9472

F50-54

9472

15K→20K

9.3 - 12.4 mi

Top 82%
×5story building
+106ft-86ft

Overall

23238

Females

9268

F50-54

9268

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23366

Females

9352

F50-54

9352

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

22827

Females

9105

F50-54

9105

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

22674

Females

9143

F50-54

9143

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

21700

Females

8736

F50-54

8736

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

19576

Females

7677

F50-54

7677

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

19573

Females

7765

F50-54

7765

35K→23M

21.8 - 23.0 mi

Top 69%
×5story building
+23ft-63ft

Overall

19488

Females

7783

F50-54

7783

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

19765

Females

7972

F50-54

7972

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

19466

Females

7882

F50-54

7882

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17792

Females

7044

F50-54

7044

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

18963

Females

7584

F50-54

7584

Passing Analysis

Category:
Athletes Passed
3297
Passed By
147
Net Change
+3150
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25671
5K → 10K75014+736#25671#24935
10K → 15K41311+402#24935#24533
15K → 20K35217+335#24533#24198
20K → Half4910+39#24198#24159
Half → 25K26325+238#24159#23921
25K → 30K30233+269#23921#23652
30K → 20M16013+147#23652#23505
20M → 21M2204+216#23505#23289
21M → 35K1221+121#23289#23168
35K → 23M2044+200#23168#22968
23M → 24M1543+151#22968#22817
24M → 40K1353+132#22817#22685
40K → 25.2M525+47#22685#22638
25.2M → Finish1214+117#22638#22521
TOTALS3297147+3150

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