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BOSTON MARATHON 2025

Xiaotong Zhou

Bib: 23952•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

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
9:19/mi
28:57
↑ 97↓ 3451.5%
10K· 6.21 mi
9:30/mi
58:27
↑ 79↓ 1380.4%
15K· 9.32 mi
9:36/mi
1:28:16
↑ 67↓ 78
20K· 12.43 mi
10:06/mi
1:59:39
↑ 106↓ 860.1%
Half· 13.11 mi
9:35/mi
2:06:11
↑ 19↓ 370.5%
25K· 15.53 mi
10:47/mi
2:32:19
↑ 66↓ 880.2%
30K· 18.64 mi
11:02/mi
3:06:37
↑ 181↓ 1480.2%
20M
10:44/mi
3:21:12
↑ 64↓ 500.2%
21M
12:02/mi
3:33:14
↑ 106↓ 241.6%
35K· 21.75 mi
10:35/mi
3:41:09
↑ 17↓ 861.7%
23M
11:05/mi
3:55:02
↑ 23↓ 630.6%
24M
12:55/mi
4:07:57
↓ 821.3%
40K· 24.85 mi
10:40/mi
4:17:04
↓ 200.3%
25.2M
12:05/mi
4:21:14
↑ 13↓ 160.2%
Finish· 26.22 mi
9:56/mi
4:31:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:11
Pace9:38 /mi
2nd Half
Distance13.11 mi
Time2:25:10
Pace11:04 /mi
📊Positive Split: 15.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:4528:579:1928:57
9:19
-
10K
6.21 mi11:58:1558:279:2429:30
9:30
+0:11
15K
9.32 mi12:28:041:28:169:2829:49
9:36
+0:06
20K
12.43 mi12:59:271:59:399:3831:23
10:06
+0:30
Half
13.11 mi13:05:592:06:119:386:32
9:35
-0:31
25K
15.53 mi13:32:072:32:199:4826:08
10:47
+1:12
30K
18.64 mi14:06:253:06:3710:0134:18
11:02
+0:15
20M
20.00 mi14:21:003:21:1210:0414:35
10:44
-0:18
21M
21.00 mi14:33:023:33:1410:0912:02
12:02
+1:18
35K
21.75 mi14:40:573:41:0910:107:55
10:35
-1:27
23M
23.00 mi14:54:503:55:0210:1313:53
11:05
+0:30
24M
24.00 mi15:07:454:07:5710:2012:55
12:55
+1:50
40K
24.85 mi15:16:524:17:0410:219:07
10:40
-2:15
25.2M
25.20 mi15:21:024:21:1410:224:10
12:05
+1:25
Finish
26.22 mi15:31:094:31:2110:2110:07
9:56
-2:09

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

9:19 /mi

Average Pace

10:21 /mi

Slowest Pace

12:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:18

50% of race

Time at Steady Pace

1:45:56

39% of race

Time at Slower Pace

29:07

11% of race

Average Pace: 10:21 /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 mi11:28:4528:579:1928:57
9:19
#23620
10K
6.21 mi11:58:1558:279:2429:30
9:30
#23914
15K
9.32 mi12:28:041:28:169:2829:49
9:36
#23957
20K
12.43 mi12:59:271:59:399:3831:23
10:06
#24109
Half
13.11 mi13:05:592:06:119:386:32
9:35
#24081
25K
15.53 mi13:32:072:32:199:4826:08
10:47
#24265
30K
18.64 mi14:06:253:06:3710:0134:18
11:02
#24256
20M
20.00 mi14:21:003:21:1210:0414:35
10:44
#24139
21M
21.00 mi14:33:023:33:1410:0912:02
12:02
#24125
35K
21.75 mi14:40:573:41:0910:107:55
10:35
#24098
23M
23.00 mi14:54:503:55:0210:1313:53
11:05
#24042
24M
24.00 mi15:07:454:07:5710:2012:55
12:55
#24242
40K
24.85 mi15:16:524:17:0410:219:07
10:40
#24193
25.2M
25.20 mi15:21:024:21:1410:224:10
12:05
#24176
Finish
26.22 mi15:31:094:31:2110:2110:07
9:56
#24130
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi236209498949824014(Top 85%)9679(Top 79%)9679(Top 743%)
10K6.21 mi3.10 mi23914-2949641-1439641-14324094(Top 85%)9737(Top 80%)9737(Top 747%)
15K9.32 mi3.11 mi23957-439651-109651-1024014(Top 85%)9679(Top 79%)9679(Top 743%)
20K12.43 mi3.11 mi24109-1529753-1029753-10224449(Top 86%)9959(Top 81%)9959(Top 764%)
Half13.11 mi0.68 mi24081+289737+169737+1623814(Top 84%)9601(Top 79%)9601(Top 737%)
25K15.53 mi2.42 mi24265-1849859-1229859-12224874(Top 88%)10217(Top 84%)10217(Top 784%)
30K18.64 mi3.11 mi24256+99870-119870-1124075(Top 85%)9902(Top 81%)9902(Top 760%)
20M20.00 mi1.36 mi24139+1179832+389832+3823037(Top 81%)9442(Top 77%)9442(Top 725%)
21M21.00 mi1.00 mi24125+149833-19833-123665(Top 83%)9848(Top 81%)9848(Top 756%)
35K21.75 mi0.75 mi24098+279822+119822+1123356(Top 82%)9735(Top 80%)9735(Top 747%)
23M23.00 mi1.25 mi24042+569818+49818+423440(Top 83%)9822(Top 80%)9822(Top 754%)
24M24.00 mi1.00 mi24242-2009929-1119929-11126777(Top 94%)11520(Top 94%)11520(Top 884%)
40K24.85 mi0.85 mi24193+499923+69923+622361(Top 79%)9394(Top 77%)9394(Top 721%)
25.2M25.20 mi0.35 mi24176+179924-19924-123440(Top 83%)9886(Top 81%)9886(Top 759%)
Finish26.22 mi1.02 mi24130+469903+219903+2122724(Top 80%)9536(Top 78%)9536(Top 732%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

24014

Females

9679

F50-54

9679

5K→10K

3.1 - 6.2 mi

Top 85%
×5story building
+79ft-138ft

Overall

24094

Females

9737

F50-54

9737

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

24014

Females

9679

F50-54

9679

15K→20K

9.3 - 12.4 mi

Top 86%
×5story building
+106ft-86ft

Overall

24449

Females

9959

F50-54

9959

20K→Half

12.4 - 13.1 mi

Top 84%
×2story building
+19ft-37ft

Overall

23814

Females

9601

F50-54

9601

Half→25K

13.1 - 15.5 mi

Top 88%
×4story building
+66ft-88ft

Overall

24874

Females

10217

F50-54

10217

25K→30K

15.5 - 18.6 mi

Top 85%
×9story building
+181ft-148ft

Overall

24075

Females

9902

F50-54

9902

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

23037

Females

9442

F50-54

9442

20M→21M

20.0 - 21.0 mi

Top 83%
×8story building
+106ft-24ft

Overall

23665

Females

9848

F50-54

9848

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23356

Females

9735

F50-54

9735

35K→23M

21.8 - 23.0 mi

Top 83%
×5story building
+23ft-63ft

Overall

23440

Females

9822

F50-54

9822

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

26777

Females

11520

F50-54

11520

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22361

Females

9394

F50-54

9394

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

23440

Females

9886

F50-54

9886

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2story building
+22ft-21ft

Overall

22724

Females

9536

F50-54

9536

Passing Analysis

Category:
Athletes Passed
1127
Passed By
1637
Net Change
-510
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23620
5K → 10K139433-294#23620#23914
10K → 15K131174-43#23914#23957
15K → 20K93245-152#23957#24109
20K → Half4012+28#24109#24081
Half → 25K63247-184#24081#24265
25K → 30K151142+9#24265#24256
30K → 20M13619+117#24256#24139
20M → 21M7056+14#24139#24125
21M → 35K4316+27#24125#24098
35K → 23M9842+56#24098#24042
23M → 24M7207-200#24042#24242
24M → 40K6516+49#24242#24193
40K → 25.2M2710+17#24193#24176
25.2M → Finish6418+46#24176#24130
TOTALS11271637-510
📊

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