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BOSTON MARATHON 2025

Dongjian Deng

Bib: 12666•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 23%
Gender (Male)
#0 / 16105
Top 35%
Masters (Masters Men)
#0 / 10463
Top 22%
Division (M45-49)
#0 / 2386
Top 30%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:17
Rank: #4056
Start → 5K
20:17 | 6:32/mi
10K· 6.21 mi
40:36
Rank: #4011 (+45)
5K → 10K
20:19 | 6:32/mi
15K· 9.32 mi
1:01:09
Rank: #4102 (-91)
10K → 15K
20:33 | 6:37/mi
20K· 12.43 mi
1:21:59
Rank: #4145 (-43)
15K → 20K
20:50 | 6:42/mi
Half· 13.11 mi
1:26:30
Rank: #4153 (-8)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:43:07
Rank: #4279 (-126)
Half → 25K
16:37 | 6:51/mi
30K· 18.64 mi
2:05:26
Rank: #4565 (-286)
25K → 30K
22:19 | 7:11/mi
20M
2:15:33
Rank: #4760 (-195)
30K → 20M
10:07 | 7:27/mi
21M
2:23:58
Rank: #5061 (-301)
20M → 21M
8:25 | 8:25/mi
35K· 21.75 mi
2:29:41
Rank: #5253 (-192)
21M → 35K
5:43 | 7:38/mi
23M
2:40:04
Rank: #5554 (-301)
35K → 23M
10:23 | 8:18/mi
24M
2:48:29
Rank: #5824 (-270)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
2:56:11
Rank: #6118 (-294)
24M → 40K
7:42 | 9:00/mi
25.2M
2:59:38
Rank: #6272 (-154)
40K → 25.2M
3:27 | 10:00/mi
Finish· 26.22 mi
3:08:16
Rank: #6561 (-289)
25.2M → Finish
8:38 | 8:28/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:30
Pace6:36 /mi
2nd Half
Distance13.11 mi
Time1:41:46
Pace7:46 /mi
📊Positive Split: 17.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:4420:176:3220:17
6:32
-
10K
6.21 mi11:08:0340:366:3220:19
6:32
0:00
15K
9.32 mi11:28:361:01:096:3420:33
6:37
+0:05
20K
12.43 mi11:49:261:21:596:3620:50
6:42
+0:05
Half
13.11 mi11:53:571:26:306:364:31
6:37
-0:05
25K
15.53 mi12:10:341:43:076:3816:37
6:51
+0:14
30K
18.64 mi12:32:532:05:266:4422:19
7:11
+0:20
20M
20.00 mi12:43:002:15:336:4710:07
7:27
+0:16
21M
21.00 mi12:51:252:23:586:518:25
8:25
+0:58
35K
21.75 mi12:57:082:29:416:535:43
7:38
-0:47
23M
23.00 mi13:07:312:40:046:5810:23
8:18
+0:40
24M
24.00 mi13:15:562:48:297:018:25
8:25
+0:07
40K
24.85 mi13:23:382:56:117:057:42
9:00
+0:35
25.2M
25.20 mi13:27:052:59:387:083:27
10:00
+1:00
Finish
26.22 mi13:35:433:08:167:118:38
8:28
-1:32

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

6:32 /mi

Average Pace

7:11 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:07

55% of race

Time at Steady Pace

38:09

20% of race

Time at Slower Pace

47:00

25% of race

Average Pace: 7:11 /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 mi10:47:4420:176:3220:17
6:32
#4056
10K
6.21 mi11:08:0340:366:3220:19
6:32
#4011
15K
9.32 mi11:28:361:01:096:3420:33
6:37
#4102
20K
12.43 mi11:49:261:21:596:3620:50
6:42
#4145
Half
13.11 mi11:53:571:26:306:364:31
6:37
#4153
25K
15.53 mi12:10:341:43:076:3816:37
6:51
#4279
30K
18.64 mi12:32:532:05:266:4422:19
7:11
#4565
20M
20.00 mi12:43:002:15:336:4710:07
7:27
#4760
21M
21.00 mi12:51:252:23:586:518:25
8:25
#5061
35K
21.75 mi12:57:082:29:416:535:43
7:38
#5253
23M
23.00 mi13:07:312:40:046:5810:23
8:18
#5554
24M
24.00 mi13:15:562:48:297:018:25
8:25
#5824
40K
24.85 mi13:23:382:56:117:057:42
9:00
#6118
25.2M
25.20 mi13:27:052:59:387:083:27
10:00
#6272
Finish
26.22 mi13:35:433:08:167:118:38
8:28
#6561
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi4056382638264358(Top 15%)4092(Top 25%)4092(Top 172%)
10K6.21 mi3.10 mi4011+453790+363790+364013(Top 14%)3778(Top 23%)3778(Top 158%)
15K9.32 mi3.11 mi4102-913866-763866-764358(Top 15%)4092(Top 25%)4092(Top 172%)
20K12.43 mi3.11 mi4145-433899-333899-334492(Top 16%)4187(Top 26%)4187(Top 175%)
Half13.11 mi0.68 mi4153-83908-93908-94652(Top 16%)4345(Top 27%)4345(Top 182%)
25K15.53 mi2.42 mi4279-1264014-1064014-1065315(Top 19%)4862(Top 30%)4862(Top 204%)
30K18.64 mi3.11 mi4565-2864253-2394253-2395811(Top 20%)5173(Top 32%)5173(Top 217%)
20M20.00 mi1.36 mi4760-1954409-1564409-1566658(Top 23%)5618(Top 35%)5618(Top 235%)
21M21.00 mi1.00 mi5061-3014652-2434652-2439913(Top 35%)7303(Top 45%)7303(Top 306%)
35K21.75 mi0.75 mi5253-1924809-1574809-1579581(Top 34%)7135(Top 44%)7135(Top 299%)
23M23.00 mi1.25 mi5554-3015039-2305039-23011973(Top 42%)8211(Top 51%)8211(Top 344%)
24M24.00 mi1.00 mi5824-2705225-1865225-18613949(Top 49%)9099(Top 56%)9099(Top 381%)
40K24.85 mi0.85 mi6118-2945436-2115436-21116282(Top 57%)10031(Top 62%)10031(Top 420%)
25.2M25.20 mi0.35 mi6272-1545533-975533-9716944(Top 60%)10309(Top 64%)10309(Top 432%)
Finish26.22 mi1.02 mi6561-2895698-1655698-16515991(Top 56%)9923(Top 62%)9923(Top 416%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

4358

Males

4092

M45-49

4092

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

4013

Males

3778

M45-49

3778

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

4358

Males

4092

M45-49

4092

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4492

Males

4187

M45-49

4187

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4652

Males

4345

M45-49

4345

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5315

Males

4862

M45-49

4862

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5811

Males

5173

M45-49

5173

30K→20M

18.6 - 20.0 mi

Top 23%
×5stories
+64ft-50ft

Overall

6658

Males

5618

M45-49

5618

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9913

Males

7303

M45-49

7303

21M→35K

21.0 - 21.8 mi

Top 34%
×7stories
+17ft-86ft

Overall

9581

Males

7135

M45-49

7135

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

11973

Males

8211

M45-49

8211

23M→24M

23.0 - 24.0 mi

Top 49%
×6stories
+12ft-82ft

Overall

13949

Males

9099

M45-49

9099

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16282

Males

10031

M45-49

10031

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

16944

Males

10309

M45-49

10309

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

15991

Males

9923

M45-49

9923

Passing Analysis

Category:
Athletes Passed
604
Passed By
3109
Net Change
-2505
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4056
5K → 10K183138+45#4056#4011
10K → 15K54145-91#4011#4102
15K → 20K94137-43#4102#4145
20K → Half1321-8#4145#4153
Half → 25K56182-126#4153#4279
25K → 30K73359-286#4279#4565
30K → 20M26221-195#4565#4760
20M → 21M16317-301#4760#5061
21M → 35K17209-192#5061#5253
35K → 23M30331-301#5253#5554
23M → 24M11281-270#5554#5824
24M → 40K10304-294#5824#6118
40K → 25.2M4158-154#6118#6272
25.2M → Finish17306-289#6272#6561
TOTALS6043109-2505
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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