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BOSTON MARATHON 2026

Dongjian Deng

Bib: 12307•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M45-49)
#0 / 2413
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
23:35
3.11 mi
Rank: #13551
Start → 5K
23:35 | 7:36/mi
10K
47:58
6.21 mi
Rank: #14790 (-1239)
5K → 10K
24:23 | 7:51/mi
15K
1:12:56
9.32 mi
Rank: #15627 (-837)
10K → 15K
24:58 | 8:03/mi
20K
1:39:20
12.43 mi
Rank: #16750 (-1123)
15K → 20K
26:24 | 8:30/mi
HALF
1:45:14
13.11 mi
Rank: #17014 (-264)
20K → HALF
5:54 | 8:40/mi
25K
2:06:49
15.53 mi
Rank: #17694 (-680)
HALF → 25K
21:35 | 8:54/mi
30K
2:38:13
18.64 mi
Rank: #19116 (-1422)
25K → 30K
31:24 | 10:07/mi
20M
2:53:37
20.00 mi
Rank: #20010 (-894)
30K → 20M
15:24 | 11:21/mi
21M
3:05:57
21.00 mi
Rank: #20602 (-592)
20M → 21M
12:20 | 12:20/mi
35K
3:13:33
21.75 mi
Rank: #20744 (-142)
21M → 35K
7:36 | 10:10/mi
23M
3:27:34
23.00 mi
Rank: #21202 (-458)
35K → 23M
14:01 | 11:13/mi
24M
3:38:47
24.00 mi
Rank: #21530 (-328)
23M → 24M
11:13 | 11:13/mi
40K
3:49:03
24.85 mi
Rank: #21871 (-341)
24M → 40K
10:16 | 12:01/mi
25.2M
3:53:32
25.20 mi
Rank: #21957 (-86)
40K → 25.2M
4:29 | 13:01/mi
FINISH
4:04:57
26.22 mi
Rank: #22199 (-242)
25.2M → FINISH
11:25 | 11:13/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:45:14
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time2:19:43
Pace10:40 /mi
📊Positive Split: 32.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:0223:357:3623:35
7:36
-
10K
6.21 mi11:16:2547:587:4424:23
7:51
+0:15
15K
9.32 mi11:41:231:12:567:5024:58
8:03
+0:12
20K
12.43 mi12:07:471:39:208:0026:24
8:30
+0:27
HALF
13.11 mi12:13:411:45:148:025:54
8:40
+0:10
25K
15.53 mi12:35:162:06:498:1021:35
8:54
+0:14
30K
18.64 mi13:06:402:38:138:3031:24
10:07
+1:13
20M
20.00 mi13:22:042:53:378:4115:24
11:21
+1:14
21M
21.00 mi13:34:243:05:578:5212:20
12:20
+0:59
35K
21.75 mi13:42:003:13:338:547:36
10:10
-2:10
23M
23.00 mi13:56:013:27:349:0214:01
11:13
+1:03
24M
24.00 mi14:07:143:38:479:0711:13
11:13
0:00
40K
24.85 mi14:17:303:49:039:1310:16
12:01
+0:48
25.2M
25.20 mi14:21:593:53:329:174:29
13:01
+1:00
FINISH
26.22 mi14:33:244:04:579:2111:25
11:13
-1:48

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:36 /mi

Average Pace

9:21 /mi

Slowest Pace

13:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:06:49

52% of race

Time at Steady Pace

39:00

16% of race

Time at Slower Pace

1:19:08

32% of race

Average Pace: 9:21 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:52:0223:357:3623:35
7:36
#13551
10K
6.21 mi11:16:2547:587:4424:23
7:51
#14790
15K
9.32 mi11:41:231:12:567:5024:58
8:03
#15627
20K
12.43 mi12:07:471:39:208:0026:24
8:30
#16750
HALF
13.11 mi12:13:411:45:148:025:54
8:40
#17014
25K
15.53 mi12:35:162:06:498:1021:35
8:54
#17694
30K
18.64 mi13:06:402:38:138:3031:24
10:07
#19116
20M
20.00 mi13:22:042:53:378:4115:24
11:21
#20010
21M
21.00 mi13:34:243:05:578:5212:20
12:20
#20602
35K
21.75 mi13:42:003:13:338:547:36
10:10
#20744
23M
23.00 mi13:56:013:27:349:0214:01
11:13
#21202
24M
24.00 mi14:07:143:38:479:0711:13
11:13
#21530
40K
24.85 mi14:17:303:49:039:1310:16
12:01
#21871
25.2M
25.20 mi14:21:593:53:329:174:29
13:01
#21957
FINISH
26.22 mi14:33:244:04:579:2111:25
11:13
#22199
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi135519697969717293(Top 60%)11149(Top 68%)11149(Top 462%)
10K6.21 mi3.10 mi14790-123910154-45710154-45716037(Top 55%)10647(Top 65%)10647(Top 441%)
15K9.32 mi3.11 mi15627-83710443-28910443-28917293(Top 60%)11149(Top 68%)11149(Top 462%)
20K12.43 mi3.11 mi16750-112310895-45210895-45219298(Top 66%)11980(Top 73%)11980(Top 496%)
HALF13.11 mi0.68 mi17014-26411000-10511000-10521097(Top 73%)12844(Top 79%)12844(Top 532%)
25K15.53 mi2.42 mi17694-68011293-29311293-29320709(Top 71%)12608(Top 77%)12608(Top 523%)
30K18.64 mi3.11 mi19116-142211865-57211865-57223386(Top 81%)13792(Top 84%)13792(Top 572%)
20M20.00 mi1.36 mi20010-89412255-39012255-39025481(Top 88%)14681(Top 90%)14681(Top 608%)
21M21.00 mi1.00 mi20602-59212535-28012535-28025537(Top 88%)14650(Top 90%)14650(Top 607%)
35K21.75 mi0.75 mi20744-14212580-4512580-4523542(Top 81%)13713(Top 84%)13713(Top 568%)
23M23.00 mi1.25 mi21202-45812798-21812798-21824900(Top 86%)14283(Top 87%)14283(Top 592%)
24M24.00 mi1.00 mi21530-32812944-14612944-14625472(Top 88%)14539(Top 89%)14539(Top 603%)
40K24.85 mi0.85 mi21871-34113087-14313087-14325891(Top 89%)14700(Top 90%)14700(Top 609%)
25.2M25.20 mi0.35 mi21957-8613120-3313120-3326045(Top 90%)14803(Top 91%)14803(Top 613%)
FINISH26.22 mi1.02 mi22199-24213220-10013220-10026426(Top 91%)14972(Top 92%)14972(Top 620%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21
+97ft-345ft

Overall

17293

Males

11149

M45-49

11149

5K→10K

3.1 - 6.2 mi

Top 55%
×5
+79ft-138ft

Overall

16037

Males

10647

M45-49

10647

10K→15K

6.2 - 9.3 mi

Top 60%
×3
+67ft-78ft

Overall

17293

Males

11149

M45-49

11149

15K→20K

9.3 - 12.4 mi

Top 66%
×5
+106ft-86ft

Overall

19298

Males

11980

M45-49

11980

20K→HALF

12.4 - 13.1 mi

Top 73%
×2
+19ft-37ft

Overall

21097

Males

12844

M45-49

12844

HALF→25K

13.1 - 15.5 mi

Top 71%
×4
+66ft-88ft

Overall

20709

Males

12608

M45-49

12608

25K→30K

15.5 - 18.6 mi

Top 81%
×9
+181ft-148ft

Overall

23386

Males

13792

M45-49

13792

30K→20M

18.6 - 20.0 mi

Top 88%
×5
+64ft-50ft

Overall

25481

Males

14681

M45-49

14681

20M→21M

20.0 - 21.0 mi

Top 88%
×8
+106ft-24ft

Overall

25537

Males

14650

M45-49

14650

21M→35K

21.0 - 21.8 mi

Top 81%
×7
+17ft-86ft

Overall

23542

Males

13713

M45-49

13713

35K→23M

21.8 - 23.0 mi

Top 86%
×5
+23ft-63ft

Overall

24900

Males

14283

M45-49

14283

23M→24M

23.0 - 24.0 mi

Top 88%
×6
+12ft-82ft

Overall

25472

Males

14539

M45-49

14539

24M→40K

24.0 - 24.9 mi

Top 89%
×1
+6ft-20ft

Overall

25891

Males

14700

M45-49

14700

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1
+13ft-16ft

Overall

26045

Males

14803

M45-49

14803

25.2M→FINISH

25.2 - 26.2 mi

Top 91%
×2
+22ft-21ft

Overall

26426

Males

14972

M45-49

14972

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
254
Passed By
2654
Net Change
-8648
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13551
5K → 10K45200-1239#13551#14790
10K → 15K40200-837#14790#15627
15K → 20K26200-1123#15627#16750
20K → HALF6200-264#16750#17014
HALF → 25K20200-680#17014#17694
25K → 30K30200-1422#17694#19116
30K → 20M8200-894#19116#20010
20M → 21M10200-592#20010#20602
21M → 35K20162-142#20602#20744
35K → 23M11200-458#20744#21202
23M → 24M16200-328#21202#21530
24M → 40K11200-341#21530#21871
40K → 25.2M692-86#21871#21957
25.2M → FINISH5200-242#21957#22199
TOTALS2542654-8648
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing