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BOSTON MARATHON 2025

Zhihong Duan

Bib: 21288 F US

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 44%
Division (F45-49)
#0 / 1813
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
8:38/mi
26:50
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:32/mi
53:21
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:35/mi
1:20:01
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:36/mi
1:46:45
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:29/mi
1:52:32
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:38/mi
2:13:29
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:03/mi
2:41:37
↑ 181↓ 1480.2%
138 ft elev
20M
8:56/mi
2:53:46
↑ 64↓ 500.2%
148 ft elev
21M
9:27/mi
3:03:13
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:32/mi
3:09:36
↑ 17↓ 861.7%
156 ft elev
23M
8:55/mi
3:20:46
↑ 23↓ 630.6%
116 ft elev
24M
8:40/mi
3:29:26
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:35/mi
3:36:46
↓ 200.3%
20 ft elev
25.2M
9:31/mi
3:40:03
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:19/mi
3:48:32
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:32
Pace8:35 /mi
2nd Half
Distance13.11 mi
Time1:56:00
Pace8:51 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:5026:508:3826:50
8:38
-
10K
6.21 mi11:51:2153:218:3526:31
8:32
-0:06
15K
9.32 mi12:18:011:20:018:3526:40
8:35
+0:03
20K
12.43 mi12:44:451:46:458:3526:44
8:36
+0:01
Half
13.11 mi12:50:321:52:328:355:47
8:29
-0:07
25K
15.53 mi13:11:292:13:298:3620:57
8:38
+0:09
30K
18.64 mi13:39:372:41:378:4028:08
9:03
+0:25
20M
20.00 mi13:51:462:53:468:4112:09
8:56
-0:07
21M
21.00 mi14:01:133:03:138:439:27
9:27
+0:31
35K
21.75 mi14:07:363:09:368:436:23
8:32
-0:55
23M
23.00 mi14:18:463:20:468:4411:10
8:55
+0:23
24M
24.00 mi14:27:263:29:268:448:40
8:40
-0:15
40K
24.85 mi14:34:463:36:468:437:20
8:35
-0:05
25.2M
25.20 mi14:38:033:40:038:443:17
9:31
+0:56
Finish
26.22 mi14:46:323:48:328:438:29
8:19
-1:12

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

8:19 /mi

Average Pace

8:43 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:35:48

94% of race

Time at Steady Pace

12:44

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:43 /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 mi11:24:5026:508:3826:50
8:38
#20687
10K
6.21 mi11:51:2153:218:3526:31
8:32
#20323
15K
9.32 mi12:18:011:20:018:3526:40
8:35
#20156
20K
12.43 mi12:44:451:46:458:3526:44
8:36
#19828
Half
13.11 mi12:50:321:52:328:355:47
8:29
#19785
25K
15.53 mi13:11:292:13:298:3620:57
8:38
#19465
30K
18.64 mi13:39:372:41:378:4028:08
9:03
#19170
20M
20.00 mi13:51:462:53:468:4112:09
8:56
#18966
21M
21.00 mi14:01:133:03:138:439:27
9:27
#18756
35K
21.75 mi14:07:363:09:368:436:23
8:32
#18648
23M
23.00 mi14:18:463:20:468:4411:10
8:55
#18449
24M
24.00 mi14:27:263:29:268:448:40
8:40
#18299
40K
24.85 mi14:34:463:36:468:437:20
8:35
#18145
25.2M
25.20 mi14:38:033:40:038:443:17
9:31
#18087
Finish
26.22 mi14:46:323:48:328:438:29
8:19
#17969
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi206877903790319829(Top 70%)7345(Top 60%)7345(Top 405%)
10K6.21 mi3.10 mi20323+3647662+2417662+24120004(Top 70%)7464(Top 61%)7464(Top 412%)
15K9.32 mi3.11 mi20156+1677560+1027560+10219829(Top 70%)7345(Top 60%)7345(Top 405%)
20K12.43 mi3.11 mi19828+3287379+1817379+18118887(Top 66%)6845(Top 56%)6845(Top 378%)
Half13.11 mi0.68 mi19785+437353+267353+2619086(Top 67%)6945(Top 57%)6945(Top 383%)
25K15.53 mi2.42 mi19465+3207180+1737180+17318060(Top 64%)6462(Top 53%)6462(Top 356%)
30K18.64 mi3.11 mi19170+2957055+1257055+12517957(Top 63%)6552(Top 54%)6552(Top 361%)
20M20.00 mi1.36 mi18966+2046957+986957+9816501(Top 58%)5882(Top 48%)5882(Top 324%)
21M21.00 mi1.00 mi18756+2106867+906867+9015882(Top 56%)5651(Top 46%)5651(Top 312%)
35K21.75 mi0.75 mi18648+1086819+486819+4815720(Top 55%)5638(Top 46%)5638(Top 311%)
23M23.00 mi1.25 mi18449+1996733+866733+8615826(Top 56%)5797(Top 47%)5797(Top 320%)
24M24.00 mi1.00 mi18299+1506684+496684+4915574(Top 55%)5687(Top 47%)5687(Top 314%)
40K24.85 mi0.85 mi18145+1546626+586626+5813977(Top 49%)4963(Top 41%)4963(Top 274%)
25.2M25.20 mi0.35 mi18087+586601+256601+2514788(Top 52%)5458(Top 45%)5458(Top 301%)
Finish26.22 mi1.02 mi17969+1186553+486553+4815120(Top 53%)5557(Top 45%)5557(Top 307%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

19829

Females

7345

F45-49

7345

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

20004

Females

7464

F45-49

7464

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

19829

Females

7345

F45-49

7345

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18887

Females

6845

F45-49

6845

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19086

Females

6945

F45-49

6945

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

18060

Females

6462

F45-49

6462

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

17957

Females

6552

F45-49

6552

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

16501

Females

5882

F45-49

5882

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

15882

Females

5651

F45-49

5651

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15720

Females

5638

F45-49

5638

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

15826

Females

5797

F45-49

5797

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

15574

Females

5687

F45-49

5687

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13977

Females

4963

F45-49

4963

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

14788

Females

5458

F45-49

5458

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

15120

Females

5557

F45-49

5557

Passing Analysis

Category:
Athletes Passed
3233
Passed By
515
Net Change
+2718
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20687
5K → 10K512148+364#20687#20323
10K → 15K273106+167#20323#20156
15K → 20K36941+328#20156#19828
20K → Half5916+43#19828#19785
Half → 25K34020+320#19785#19465
25K → 30K37984+295#19465#19170
30K → 20M22420+204#19170#18966
20M → 21M22919+210#18966#18756
21M → 35K1157+108#18756#18648
35K → 23M21112+199#18648#18449
23M → 24M16010+150#18449#18299
24M → 40K1617+154#18299#18145
40K → 25.2M624+58#18145#18087
25.2M → Finish13921+118#18087#17969
TOTALS3233515+2718
📊

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