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BOSTON MARATHON 2025

David Singelyn

Bib: 27704•M

NJ

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
8:51/mi
27:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:53/mi
55:08
↑ 79↓ 1380.4%
15K· 9.32 mi
9:09/mi
1:23:35
↑ 67↓ 78
20K· 12.43 mi
9:28/mi
1:53:01
↑ 106↓ 860.1%
Half· 13.11 mi
8:20/mi
1:58:42
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:19:54
↑ 66↓ 880.2%
30K· 18.64 mi
9:17/mi
2:48:45
↑ 181↓ 1480.2%
20M
9:17/mi
3:01:22
↑ 64↓ 500.2%
21M
9:45/mi
3:11:07
↑ 106↓ 241.6%
35K· 21.75 mi
8:40/mi
3:17:36
↑ 17↓ 861.7%
23M
8:54/mi
3:28:45
↑ 23↓ 630.6%
24M
8:35/mi
3:37:20
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:44:40
↓ 200.3%
25.2M
9:43/mi
3:48:01
↑ 13↓ 160.2%
Finish· 26.22 mi
8:12/mi
3:56:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:58:42
Pace9:03 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:57:40
Pace8:59 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:1927:318:5127:31
8:51
-
10K
6.21 mi12:23:5655:088:5227:37
8:53
+0:02
15K
9.32 mi12:52:231:23:358:5828:27
9:09
+0:16
20K
12.43 mi13:21:491:53:019:0629:26
9:28
+0:19
Half
13.11 mi13:27:301:58:429:035:41
8:20
-1:08
25K
15.53 mi13:48:422:19:549:0021:12
8:45
+0:25
30K
18.64 mi14:17:332:48:459:0328:51
9:17
+0:32
20M
20.00 mi14:30:103:01:229:0412:37
9:17
0:00
21M
21.00 mi14:39:553:11:079:069:45
9:45
+0:28
35K
21.75 mi14:46:243:17:369:056:29
8:40
-1:05
23M
23.00 mi14:57:333:28:459:0511:09
8:54
+0:14
24M
24.00 mi15:06:083:37:209:038:35
8:35
-0:19
40K
24.85 mi15:13:283:44:409:027:20
8:35
0:00
25.2M
25.20 mi15:16:493:48:019:033:21
9:43
+1:08
Finish
26.22 mi15:25:103:56:229:018:21
8:12
-1:31

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

8:12 /mi

Average Pace

9:01 /mi

Slowest Pace

9:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:55

52% of race

Time at Steady Pace

1:39:21

42% of race

Time at Slower Pace

13:06

6% of race

Average Pace: 9:01 /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 mi11:56:1927:318:5127:31
8:51
#21783
10K
6.21 mi12:23:5655:088:5227:37
8:53
#21822
15K
9.32 mi12:52:231:23:358:5828:27
9:09
#22149
20K
12.43 mi13:21:491:53:019:0629:26
9:28
#22332
Half
13.11 mi13:27:301:58:429:035:41
8:20
#22155
25K
15.53 mi13:48:422:19:549:0021:12
8:45
#21575
30K
18.64 mi14:17:332:48:459:0328:51
9:17
#21116
20M
20.00 mi14:30:103:01:229:0412:37
9:17
#20882
21M
21.00 mi14:39:553:11:079:069:45
9:45
#20641
35K
21.75 mi14:46:243:17:369:056:29
8:40
#20525
23M
23.00 mi14:57:333:28:459:0511:09
8:54
#20267
24M
24.00 mi15:06:083:37:209:038:35
8:35
#20074
40K
24.85 mi15:13:283:44:409:027:20
8:35
#19861
25.2M
25.20 mi15:16:493:48:019:033:21
9:43
#19808
Finish
26.22 mi15:25:103:56:229:018:21
8:12
#19628
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21783132141321422682(Top 80%)13681(Top 85%)13681(Top 242%)
10K6.21 mi3.10 mi21822-3913251-3713251-3721852(Top 77%)13273(Top 82%)13273(Top 235%)
15K9.32 mi3.11 mi22149-32713414-16313414-16322682(Top 80%)13681(Top 85%)13681(Top 242%)
20K12.43 mi3.11 mi22332-18313493-7913493-7922809(Top 80%)13706(Top 85%)13706(Top 243%)
Half13.11 mi0.68 mi22155+17713413+8013413+8018091(Top 64%)11681(Top 73%)11681(Top 207%)
25K15.53 mi2.42 mi21575+58013147+26613147+26618638(Top 66%)11814(Top 73%)11814(Top 209%)
30K18.64 mi3.11 mi21116+45912911+23612911+23619044(Top 67%)11853(Top 74%)11853(Top 210%)
20M20.00 mi1.36 mi20882+23412792+11912792+11918213(Top 64%)11328(Top 70%)11328(Top 201%)
21M21.00 mi1.00 mi20641+24112656+13612656+13617248(Top 61%)10807(Top 67%)10807(Top 192%)
35K21.75 mi0.75 mi20525+11612591+6512591+6516467(Top 58%)10390(Top 65%)10390(Top 184%)
23M23.00 mi1.25 mi20267+25812445+14612445+14615705(Top 55%)9949(Top 62%)9949(Top 176%)
24M24.00 mi1.00 mi20074+19312342+10312342+10315051(Top 53%)9620(Top 60%)9620(Top 171%)
40K24.85 mi0.85 mi19861+21312217+12512217+12513927(Top 49%)8976(Top 56%)8976(Top 159%)
25.2M25.20 mi0.35 mi19808+5312192+2512192+2515671(Top 55%)9737(Top 60%)9737(Top 173%)
Finish26.22 mi1.02 mi19628+18012093+9912093+9914226(Top 50%)9136(Top 57%)9136(Top 162%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

22682

Males

13681

M18-39

13681

5K→10K

3.1 - 6.2 mi

Top 77%
×5story building
+79ft-138ft

Overall

21852

Males

13273

M18-39

13273

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

22682

Males

13681

M18-39

13681

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

22809

Males

13706

M18-39

13706

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18091

Males

11681

M18-39

11681

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18638

Males

11814

M18-39

11814

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

19044

Males

11853

M18-39

11853

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

18213

Males

11328

M18-39

11328

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17248

Males

10807

M18-39

10807

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

16467

Males

10390

M18-39

10390

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

15705

Males

9949

M18-39

9949

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

15051

Males

9620

M18-39

9620

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13927

Males

8976

M18-39

8976

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15671

Males

9737

M18-39

9737

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

14226

Males

9136

M18-39

9136

Passing Analysis

Category:
Athletes Passed
3239
Passed By
1084
Net Change
+2155
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21783
5K → 10K246285-39#21783#21822
10K → 15K104431-327#21822#22149
15K → 20K132315-183#22149#22332
20K → Half1770+177#22332#22155
Half → 25K5800+580#22155#21575
25K → 30K48223+459#21575#21116
30K → 20M2439+234#21116#20882
20M → 21M2476+241#20882#20641
21M → 35K1204+116#20641#20525
35K → 23M2602+258#20525#20267
23M → 24M1930+193#20267#20074
24M → 40K2152+213#20074#19861
40K → 25.2M563+53#19861#19808
25.2M → Finish1844+180#19808#19628
TOTALS32391084+2155
📊

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