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BOSTON MARATHON 2025

Zhihong Lai

Bib: 23298•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 48%
Division (F55-59)
#0 / 994
Top 29%
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
8:06/mi
25:09
↑ 97↓ 3451.5%
10K· 6.21 mi
8:12/mi
50:39
↑ 79↓ 1380.4%
15K· 9.32 mi
8:14/mi
1:16:13
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:42:37
↑ 106↓ 860.1%
Half· 13.11 mi
8:20/mi
1:48:18
↑ 19↓ 370.5%
25K· 15.53 mi
8:40/mi
2:09:19
↑ 66↓ 880.2%
30K· 18.64 mi
9:14/mi
2:38:01
↑ 181↓ 1480.2%
20M
9:26/mi
2:50:50
↑ 64↓ 500.2%
21M
10:15/mi
3:01:05
↑ 106↓ 241.6%
35K· 21.75 mi
9:15/mi
3:08:00
↑ 17↓ 861.7%
23M
9:39/mi
3:20:05
↑ 23↓ 630.6%
24M
9:42/mi
3:29:47
↓ 821.3%
40K· 24.85 mi
10:00/mi
3:38:20
↓ 200.3%
25.2M
10:50/mi
3:42:04
↑ 13↓ 160.2%
Finish· 26.22 mi
9:09/mi
3:51:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:18
Pace8:16 /mi
2nd Half
Distance13.11 mi
Time2:03:05
Pace9:23 /mi
📊Positive Split: 13.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:1125:098:0625:09
8:06
-
10K
6.21 mi11:47:4150:398:0925:30
8:12
+0:06
15K
9.32 mi12:13:151:16:138:1125:34
8:14
+0:02
20K
12.43 mi12:39:391:42:378:1526:24
8:30
+0:16
Half
13.11 mi12:45:201:48:188:165:41
8:20
-0:10
25K
15.53 mi13:06:212:09:198:1921:01
8:40
+0:20
30K
18.64 mi13:35:032:38:018:2928:42
9:14
+0:34
20M
20.00 mi13:47:522:50:508:3212:49
9:26
+0:12
21M
21.00 mi13:58:073:01:058:3710:15
10:15
+0:49
35K
21.75 mi14:05:023:08:008:396:55
9:15
-1:00
23M
23.00 mi14:17:073:20:058:4212:05
9:39
+0:24
24M
24.00 mi14:26:493:29:478:449:42
9:42
+0:03
40K
24.85 mi14:35:223:38:208:478:33
10:00
+0:18
25.2M
25.20 mi14:39:063:42:048:493:44
10:50
+0:50
Finish
26.22 mi14:48:253:51:238:509:19
9:09
-1:41

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

8:06 /mi

Average Pace

8:50 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:19

56% of race

Time at Steady Pace

57:45

25% of race

Time at Slower Pace

44:19

19% of race

Average Pace: 8:49 /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 mi11:22:1125:098:0625:09
8:06
#17324
10K
6.21 mi11:47:4150:398:0925:30
8:12
#17651
15K
9.32 mi12:13:151:16:138:1125:34
8:14
#17622
20K
12.43 mi12:39:391:42:378:1526:24
8:30
#17743
Half
13.11 mi12:45:201:48:188:165:41
8:20
#17751
25K
15.53 mi13:06:212:09:198:1921:01
8:40
#17748
30K
18.64 mi13:35:032:38:018:2928:42
9:14
#17951
20M
20.00 mi13:47:522:50:508:3212:49
9:26
#18038
21M
21.00 mi13:58:073:01:058:3710:15
10:15
#18158
35K
21.75 mi14:05:023:08:008:396:55
9:15
#18199
23M
23.00 mi14:17:073:20:058:4212:05
9:39
#18283
24M
24.00 mi14:26:493:29:478:449:42
9:42
#18388
40K
24.85 mi14:35:223:38:208:478:33
10:00
#18507
25.2M
25.20 mi14:39:063:42:048:493:44
10:50
#18557
Finish
26.22 mi14:48:253:51:238:509:19
9:09
#18621
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi173245929592917595(Top 62%)6075(Top 50%)6075(Top 611%)
10K6.21 mi3.10 mi17651-3276123-1946123-19417959(Top 63%)6268(Top 51%)6268(Top 631%)
15K9.32 mi3.11 mi17622+296093+306093+3017595(Top 62%)6075(Top 50%)6075(Top 611%)
20K12.43 mi3.11 mi17743-1216188-956188-9518238(Top 64%)6473(Top 53%)6473(Top 651%)
Half13.11 mi0.68 mi17751-86197-96197-918200(Top 64%)6450(Top 53%)6450(Top 649%)
25K15.53 mi2.42 mi17748+36207-106207-1018215(Top 64%)6546(Top 54%)6546(Top 659%)
30K18.64 mi3.11 mi17951-2036374-1676374-16718832(Top 66%)7027(Top 57%)7027(Top 707%)
20M20.00 mi1.36 mi18038-876445-716445-7118869(Top 66%)7195(Top 59%)7195(Top 724%)
21M21.00 mi1.00 mi18158-1206531-866531-8619204(Top 68%)7439(Top 61%)7439(Top 748%)
35K21.75 mi0.75 mi18199-416572-416572-4119362(Top 68%)7637(Top 62%)7637(Top 768%)
23M23.00 mi1.25 mi18283-846642-706642-7019284(Top 68%)7662(Top 63%)7662(Top 771%)
24M24.00 mi1.00 mi18388-1056729-876729-8720386(Top 72%)8278(Top 68%)8278(Top 833%)
40K24.85 mi0.85 mi18507-1196827-986827-9820466(Top 72%)8386(Top 69%)8386(Top 844%)
25.2M25.20 mi0.35 mi18557-506868-416868-4120130(Top 71%)8220(Top 67%)8220(Top 827%)
Finish26.22 mi1.02 mi18621-646913-456913-4519712(Top 69%)7982(Top 65%)7982(Top 803%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

17595

Females

6075

F55-59

6075

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

17959

Females

6268

F55-59

6268

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

17595

Females

6075

F55-59

6075

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

18238

Females

6473

F55-59

6473

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18200

Females

6450

F55-59

6450

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

18215

Females

6546

F55-59

6546

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

18832

Females

7027

F55-59

7027

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

18869

Females

7195

F55-59

7195

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

19204

Females

7439

F55-59

7439

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

19362

Females

7637

F55-59

7637

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

19284

Females

7662

F55-59

7662

23M→24M

23.0 - 24.0 mi

Top 72%
×6story building
+12ft-82ft

Overall

20386

Females

8278

F55-59

8278

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20466

Females

8386

F55-59

8386

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

20130

Females

8220

F55-59

8220

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

19712

Females

7982

F55-59

7982

Passing Analysis

Category:
Athletes Passed
1321
Passed By
2618
Net Change
-1297
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17324
5K → 10K161488-327#17324#17651
10K → 15K206177+29#17651#17622
15K → 20K150271-121#17622#17743
20K → Half3038-8#17743#17751
Half → 25K171168+3#17751#17748
25K → 30K162365-203#17748#17951
30K → 20M100187-87#17951#18038
20M → 21M57177-120#18038#18158
21M → 35K5091-41#18158#18199
35K → 23M78162-84#18199#18283
23M → 24M54159-105#18283#18388
24M → 40K38157-119#18388#18507
40K → 25.2M2575-50#18507#18557
25.2M → Finish39103-64#18557#18621
TOTALS13212618-1297
📊

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