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BOSTON MARATHON 2025

Theodore Chang

Bib: 12568•X

CA

0:00
0:00
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Overall
#0 / 28404
Gender (Other)
#0 / 71
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
8:01/mi
24:54
↑ 97↓ 3451.5%
10K· 6.21 mi
8:38/mi
51:42
↑ 79↓ 1380.4%
15K· 9.32 mi
8:57/mi
1:19:31
↑ 67↓ 78
20K· 12.43 mi
9:27/mi
1:48:54
↑ 106↓ 860.1%
Half· 13.11 mi
9:08/mi
1:55:08
↑ 19↓ 370.5%
25K· 15.53 mi
9:29/mi
2:18:07
↑ 66↓ 880.2%
30K· 18.64 mi
9:54/mi
2:48:53
↑ 181↓ 1480.2%
20M
10:09/mi
3:02:40
↑ 64↓ 500.2%
21M
11:51/mi
3:14:31
↑ 106↓ 241.6%
35K· 21.75 mi
10:10/mi
3:22:07
↑ 17↓ 861.7%
23M
10:42/mi
3:35:31
↑ 23↓ 630.6%
24M
10:11/mi
3:45:42
↓ 821.3%
40K· 24.85 mi
11:35/mi
3:55:36
↓ 200.3%
25.2M
11:10/mi
3:59:27
↑ 13↓ 160.2%
Finish· 26.22 mi
10:03/mi
4:09:41
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:08
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time2:14:33
Pace10:16 /mi
📊Positive Split: 16.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2924:548:0124:54
8:01
-
10K
6.21 mi11:19:1751:428:1926:48
8:38
+0:37
15K
9.32 mi11:47:061:19:318:3227:49
8:57
+0:19
20K
12.43 mi12:16:291:48:548:4629:23
9:27
+0:30
Half
13.11 mi12:22:431:55:088:476:14
9:08
-0:19
25K
15.53 mi12:45:422:18:078:5322:59
9:29
+0:21
30K
18.64 mi13:16:282:48:539:0430:46
9:54
+0:25
20M
20.00 mi13:30:153:02:409:0813:47
10:09
+0:15
21M
21.00 mi13:42:063:14:319:1611:51
11:51
+1:42
35K
21.75 mi13:49:423:22:079:187:36
10:10
-1:41
23M
23.00 mi14:03:063:35:319:2213:24
10:42
+0:32
24M
24.00 mi14:13:173:45:429:2410:11
10:11
-0:31
40K
24.85 mi14:23:113:55:369:299:54
11:35
+1:24
25.2M
25.20 mi14:27:023:59:279:303:51
11:10
-0:25
Finish
26.22 mi14:37:164:09:419:3210:14
10:03
-1:07

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

8:01 /mi

Average Pace

9:32 /mi

Slowest Pace

11:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:07

55% of race

Time at Steady Pace

1:12:34

29% of race

Time at Slower Pace

39:00

16% of race

Average Pace: 9:31 /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 mi10:52:2924:548:0124:54
8:01
#16685
10K
6.21 mi11:19:1751:428:1926:48
8:38
#18736
15K
9.32 mi11:47:061:19:318:3227:49
8:57
#19864
20K
12.43 mi12:16:291:48:548:4629:23
9:27
#20731
Half
13.11 mi12:22:431:55:088:476:14
9:08
#20826
25K
15.53 mi12:45:422:18:078:5322:59
9:29
#21052
30K
18.64 mi13:16:282:48:539:0430:46
9:54
#21144
20M
20.00 mi13:30:153:02:409:0813:47
10:09
#21174
21M
21.00 mi13:42:063:14:319:1611:51
11:51
#21370
35K
21.75 mi13:49:423:22:079:187:36
10:10
#21432
23M
23.00 mi14:03:063:35:319:2213:24
10:42
#21509
24M
24.00 mi14:13:173:45:429:2410:11
10:11
#21528
40K
24.85 mi14:23:113:55:369:299:54
11:35
#21676
25.2M
25.20 mi14:27:023:59:279:303:51
11:10
#21659
Finish
26.22 mi14:37:164:09:419:3210:14
10:03
#21699
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallXAge DivSeg. OverallSeg. XSeg. Age Div
5K3.11 mi3.11 mi16685515121807(Top 77%)60(Top 85%)60
10K6.21 mi3.10 mi18736-205156-556-520466(Top 72%)58(Top 82%)58
15K9.32 mi3.11 mi19864-112858-258-221807(Top 77%)60(Top 85%)60
20K12.43 mi3.11 mi20731-867585822759(Top 80%)61(Top 86%)61
Half13.11 mi0.68 mi20826-95585822321(Top 79%)60(Top 85%)60
25K15.53 mi2.42 mi21052-226585821777(Top 77%)57(Top 80%)57
30K18.64 mi3.11 mi21144-92585821303(Top 75%)56(Top 79%)56
20M20.00 mi1.36 mi21174-3059-159-121403(Top 75%)56(Top 79%)56
21M21.00 mi1.00 mi21370-19658+158+123298(Top 82%)59(Top 83%)59
35K21.75 mi0.75 mi21432-6257+157+122298(Top 79%)56(Top 79%)56
23M23.00 mi1.25 mi21509-77575722515(Top 79%)55(Top 77%)55
24M24.00 mi1.00 mi21528-19575721864(Top 77%)56(Top 79%)56
40K24.85 mi0.85 mi21676-148575724260(Top 85%)60(Top 85%)60
25.2M25.20 mi0.35 mi21659+17575721061(Top 74%)55(Top 77%)55
Finish26.22 mi1.02 mi21699-40575723043(Top 81%)59(Top 83%)59

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21807

X

60

Age Div

60

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20466

X

58

Age Div

58

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21807

X

60

Age Div

60

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

22759

X

61

Age Div

61

20K→Half

12.4 - 13.1 mi

Top 79%
×2story building
+19ft-37ft

Overall

22321

X

60

Age Div

60

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

21777

X

57

Age Div

57

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21303

X

56

Age Div

56

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

21403

X

56

Age Div

56

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23298

X

59

Age Div

59

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

22298

X

56

Age Div

56

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

22515

X

55

Age Div

55

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

21864

X

56

Age Div

56

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

24260

X

60

Age Div

60

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21061

X

55

Age Div

55

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

23043

X

59

Age Div

59

Passing Analysis

Category:
Athletes Passed
735
Passed By
5749
Net Change
-5014
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16685
5K → 10K122063-2051#16685#18736
10K → 15K301158-1128#18736#19864
15K → 20K44911-867#19864#20731
20K → Half8103-95#20731#20826
Half → 25K88314-226#20826#21052
25K → 30K177269-92#21052#21144
30K → 20M96126-30#21144#21174
20M → 21M38234-196#21174#21370
21M → 35K2991-62#21370#21432
35K → 23M72149-77#21432#21509
23M → 24M5170-19#21509#21528
24M → 40K22170-148#21528#21676
40K → 25.2M3417+17#21676#21659
25.2M → Finish3474-40#21659#21699
TOTALS7355749-5014
📊

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