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BOSTON MARATHON 2025

Chia-Shih Tseng

Bib: 11001 M TW

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
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
7:16/mi
22:36
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:20/mi
45:23
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:28/mi
1:08:34
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:41/mi
1:32:27
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:40/mi
1:37:41
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:58/mi
1:57:01
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:52/mi
2:24:34
↑ 181↓ 1480.2%
138 ft elev
20M
9:31/mi
2:37:30
↑ 64↓ 500.2%
148 ft elev
21M
10:48/mi
2:48:18
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:29/mi
2:55:24
↑ 17↓ 861.7%
156 ft elev
23M
9:28/mi
3:07:15
↑ 23↓ 630.6%
116 ft elev
24M
9:10/mi
3:16:25
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:21/mi
3:24:25
↓ 200.3%
20 ft elev
25.2M
10:29/mi
3:28:02
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:53/mi
3:37:05
↑ 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
Time1:37:41
Pace7:27 /mi
2nd Half
Distance13.11 mi
Time1:59:24
Pace9:06 /mi
📊Positive Split: 22.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:1322:367:1622:36
7:16
-
10K
6.21 mi11:16:0045:237:1822:47
7:20
+0:04
15K
9.32 mi11:39:111:08:347:2123:11
7:28
+0:08
20K
12.43 mi12:03:041:32:277:2623:53
7:41
+0:13
Half
13.11 mi12:08:181:37:417:275:14
7:40
-0:01
25K
15.53 mi12:27:381:57:017:3219:20
7:58
+0:18
30K
18.64 mi12:55:112:24:347:4527:33
8:52
+0:54
20M
20.00 mi13:08:072:37:307:5212:56
9:31
+0:39
21M
21.00 mi13:18:552:48:188:0110:48
10:48
+1:17
35K
21.75 mi13:26:012:55:248:047:06
9:29
-1:19
23M
23.00 mi13:37:523:07:158:0811:51
9:28
-0:01
24M
24.00 mi13:47:023:16:258:119:10
9:10
-0:18
40K
24.85 mi13:55:023:24:258:138:00
9:21
+0:11
25.2M
25.20 mi13:58:393:28:028:153:37
10:29
+1:08
Finish
26.22 mi14:07:423:37:058:179:03
8:53
-1:36

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

7:16 /mi

Average Pace

8:17 /mi

Slowest Pace

10:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:01

54% of race

Time at Steady Pace

53:46

25% of race

Time at Slower Pace

46:18

21% of race

Average Pace: 8:17 /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 mi10:53:1322:367:1622:36
7:16
#10093
10K
6.21 mi11:16:0045:237:1822:47
7:20
#10369
15K
9.32 mi11:39:111:08:347:2123:11
7:28
#10684
20K
12.43 mi12:03:041:32:277:2623:53
7:41
#11110
Half
13.11 mi12:08:181:37:417:275:14
7:40
#11233
25K
15.53 mi12:27:381:57:017:3219:20
7:58
#11616
30K
18.64 mi12:55:112:24:347:4527:33
8:52
#12695
20M
20.00 mi13:08:072:37:307:5212:56
9:31
#13338
21M
21.00 mi13:18:552:48:188:0110:48
10:48
#13960
35K
21.75 mi13:26:012:55:248:047:06
9:29
#14324
23M
23.00 mi13:37:523:07:158:0811:51
9:28
#14610
24M
24.00 mi13:47:023:16:258:119:10
9:10
#14774
40K
24.85 mi13:55:023:24:258:138:00
9:21
#14910
25.2M
25.20 mi13:58:393:28:028:153:37
10:29
#14990
Finish
26.22 mi14:07:423:37:058:179:03
8:53
#15149
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi100938227822711432(Top 40%)8808(Top 55%)8808(Top 369%)
10K6.21 mi3.10 mi10369-2768358-1318358-13110604(Top 37%)8465(Top 53%)8465(Top 355%)
15K9.32 mi3.11 mi10684-3158484-1268484-12611432(Top 40%)8808(Top 55%)8808(Top 369%)
20K12.43 mi3.11 mi11110-4268679-1958679-19512283(Top 43%)9097(Top 56%)9097(Top 381%)
Half13.11 mi0.68 mi11233-1238735-568735-5613142(Top 46%)9541(Top 59%)9541(Top 400%)
25K15.53 mi2.42 mi11616-3838870-1358870-13513676(Top 48%)9595(Top 60%)9595(Top 402%)
30K18.64 mi3.11 mi12695-10799291-4219291-42116978(Top 60%)10913(Top 68%)10913(Top 457%)
20M20.00 mi1.36 mi13338-6439538-2479538-24719235(Top 68%)11789(Top 73%)11789(Top 494%)
21M21.00 mi1.00 mi13960-6229780-2429780-24220822(Top 73%)12404(Top 77%)12404(Top 520%)
35K21.75 mi0.75 mi14324-3649930-1509930-15020274(Top 71%)12094(Top 75%)12094(Top 507%)
23M23.00 mi1.25 mi14610-28610015-8510015-8518513(Top 65%)11219(Top 70%)11219(Top 470%)
24M24.00 mi1.00 mi14774-16410056-4110056-4118157(Top 64%)10989(Top 68%)10989(Top 461%)
40K24.85 mi0.85 mi14910-13610091-3510091-3518077(Top 64%)10866(Top 67%)10866(Top 455%)
25.2M25.20 mi0.35 mi14990-8010102-1110102-1118914(Top 67%)11269(Top 70%)11269(Top 472%)
Finish26.22 mi1.02 mi15149-15910149-4710149-4718422(Top 65%)11071(Top 69%)11071(Top 464%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

11432

Males

8808

M45-49

8808

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

10604

Males

8465

M45-49

8465

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

11432

Males

8808

M45-49

8808

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

12283

Males

9097

M45-49

9097

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

13142

Males

9541

M45-49

9541

Half→25K

13.1 - 15.5 mi

Top 48%
×4story building
+66ft-88ft

Overall

13676

Males

9595

M45-49

9595

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

16978

Males

10913

M45-49

10913

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

19235

Males

11789

M45-49

11789

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20822

Males

12404

M45-49

12404

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20274

Males

12094

M45-49

12094

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18513

Males

11219

M45-49

11219

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

18157

Males

10989

M45-49

10989

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

18077

Males

10866

M45-49

10866

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

18914

Males

11269

M45-49

11269

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

18422

Males

11071

M45-49

11071

Passing Analysis

Category:
Athletes Passed
691
Passed By
5746
Net Change
-5056
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10093
5K → 10K137412-276#10093#10369
10K → 15K89404-315#10369#10684
15K → 20K83509-426#10684#11110
20K → Half8131-123#11110#11233
Half → 25K78461-383#11233#11616
25K → 30K651144-1079#11616#12695
30K → 20M29672-643#12695#13338
20M → 21M21643-622#13338#13960
21M → 35K13377-364#13960#14324
35K → 23M46332-286#14324#14610
23M → 24M34198-164#14610#14774
24M → 40K35171-136#14774#14910
40K → 25.2M1999-80#14910#14990
25.2M → Finish34193-159#14990#15149
TOTALS6915746-5056
📊

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