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BOSTON MARATHON 2025

David Nelson

Bib: 6082•M

SC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 21%
Division (M18-39)
#0 / 5642
Top 45%
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
6:41/mi
20:45
↑ 97↓ 3451.5%
10K· 6.21 mi
6:42/mi
41:33
↑ 79↓ 1380.4%
15K· 9.32 mi
6:37/mi
1:02:05
↑ 67↓ 78
20K· 12.43 mi
6:42/mi
1:22:55
↑ 106↓ 860.1%
Half· 13.11 mi
6:43/mi
1:27:30
↑ 19↓ 370.5%
25K· 15.53 mi
6:42/mi
1:43:44
↑ 66↓ 880.2%
30K· 18.64 mi
6:48/mi
2:04:53
↑ 181↓ 1480.2%
20M
6:54/mi
2:14:15
↑ 64↓ 500.2%
21M
7:15/mi
2:21:30
↑ 106↓ 241.6%
35K· 21.75 mi
6:38/mi
2:26:28
↑ 17↓ 861.7%
23M
6:46/mi
2:34:56
↑ 23↓ 630.6%
24M
6:42/mi
2:41:38
↓ 821.3%
40K· 24.85 mi
6:44/mi
2:47:23
↓ 200.3%
25.2M
7:24/mi
2:49:56
↑ 13↓ 160.2%
Finish· 26.22 mi
6:29/mi
2:56:32
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:30
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:29:02
Pace6:48 /mi
📊Positive Split: 1.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:5820:456:4120:45
6:41
-
10K
6.21 mi10:48:4641:336:4120:48
6:42
+0:01
15K
9.32 mi11:09:181:02:056:4020:32
6:37
-0:05
20K
12.43 mi11:30:081:22:556:4020:50
6:42
+0:05
Half
13.11 mi11:34:431:27:306:404:35
6:43
+0:01
25K
15.53 mi11:50:571:43:446:4116:14
6:42
-0:01
30K
18.64 mi12:12:062:04:536:4221:09
6:48
+0:06
20M
20.00 mi12:21:282:14:156:439:22
6:54
+0:06
21M
21.00 mi12:28:432:21:306:447:15
7:15
+0:21
35K
21.75 mi12:33:412:26:286:444:58
6:38
-0:37
23M
23.00 mi12:42:092:34:566:448:28
6:46
+0:08
24M
24.00 mi12:48:512:41:386:446:42
6:42
-0:04
40K
24.85 mi12:54:362:47:236:445:45
6:44
+0:02
25.2M
25.20 mi12:57:092:49:566:452:33
7:24
+0:40
Finish
26.22 mi13:03:452:56:326:446:36
6:29
-0:55

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

6:29 /mi

Average Pace

6:44 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:44

94% of race

Time at Steady Pace

9:48

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:44 /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 mi10:27:5820:456:4120:45
6:41
#5262
10K
6.21 mi10:48:4641:336:4120:48
6:42
#5245
15K
9.32 mi11:09:181:02:056:4020:32
6:37
#4881
20K
12.43 mi11:30:081:22:556:4020:50
6:42
#4749
Half
13.11 mi11:34:431:27:306:404:35
6:43
#4768
25K
15.53 mi11:50:571:43:446:4116:14
6:42
#4604
30K
18.64 mi12:12:062:04:536:4221:09
6:48
#4313
20M
20.00 mi12:21:282:14:156:439:22
6:54
#4199
21M
21.00 mi12:28:432:21:306:447:15
7:15
#4126
35K
21.75 mi12:33:412:26:286:444:58
6:38
#4079
23M
23.00 mi12:42:092:34:566:448:28
6:46
#3921
24M
24.00 mi12:48:512:41:386:446:42
6:42
#3844
40K
24.85 mi12:54:362:47:236:445:45
6:44
#3769
25.2M
25.20 mi12:57:092:49:566:452:33
7:24
#3739
Finish
26.22 mi13:03:452:56:326:446:36
6:29
#3624
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5262489748974304(Top 15%)4042(Top 25%)4042(Top 72%)
10K6.21 mi3.10 mi5245+174876+214876+215300(Top 19%)4912(Top 30%)4912(Top 87%)
15K9.32 mi3.11 mi4881+3644558+3184558+3184304(Top 15%)4042(Top 25%)4042(Top 72%)
20K12.43 mi3.11 mi4749+1324431+1274431+1274490(Top 16%)4185(Top 26%)4185(Top 74%)
Half13.11 mi0.68 mi4768-194447-164447-165447(Top 19%)5002(Top 31%)5002(Top 89%)
25K15.53 mi2.42 mi4604+1644298+1494298+1494101(Top 14%)3823(Top 24%)3823(Top 68%)
30K18.64 mi3.11 mi4313+2914035+2634035+2633501(Top 12%)3256(Top 20%)3256(Top 58%)
20M20.00 mi1.36 mi4199+1143930+1053930+1053492(Top 12%)3228(Top 20%)3228(Top 57%)
21M21.00 mi1.00 mi4126+733855+753855+753398(Top 12%)3120(Top 19%)3120(Top 55%)
35K21.75 mi0.75 mi4079+473808+473808+473187(Top 11%)2929(Top 18%)2929(Top 52%)
23M23.00 mi1.25 mi3921+1583660+1483660+1482539(Top 9%)2350(Top 15%)2350(Top 42%)
24M24.00 mi1.00 mi3844+773587+733587+733004(Top 11%)2728(Top 17%)2728(Top 48%)
40K24.85 mi0.85 mi3769+753513+743513+742521(Top 9%)2303(Top 14%)2303(Top 41%)
25.2M25.20 mi0.35 mi3739+303482+313482+312978(Top 10%)2657(Top 16%)2657(Top 47%)
Finish26.22 mi1.02 mi3624+1153376+1063376+1062718(Top 10%)2448(Top 15%)2448(Top 43%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21story building
+97ft-345ft

Overall

4304

Males

4042

M18-39

4042

5K→10K

3.1 - 6.2 mi

Top 19%
×5story building
+79ft-138ft

Overall

5300

Males

4912

M18-39

4912

10K→15K

6.2 - 9.3 mi

Top 15%
×3story building
+67ft-78ft

Overall

4304

Males

4042

M18-39

4042

15K→20K

9.3 - 12.4 mi

Top 16%
×5story building
+106ft-86ft

Overall

4490

Males

4185

M18-39

4185

20K→Half

12.4 - 13.1 mi

Top 19%
×2story building
+19ft-37ft

Overall

5447

Males

5002

M18-39

5002

Half→25K

13.1 - 15.5 mi

Top 14%
×4story building
+66ft-88ft

Overall

4101

Males

3823

M18-39

3823

25K→30K

15.5 - 18.6 mi

Top 12%
×9story building
+181ft-148ft

Overall

3501

Males

3256

M18-39

3256

30K→20M

18.6 - 20.0 mi

Top 12%
×5story building
+64ft-50ft

Overall

3492

Males

3228

M18-39

3228

20M→21M

20.0 - 21.0 mi

Top 12%
×8story building
+106ft-24ft

Overall

3398

Males

3120

M18-39

3120

21M→35K

21.0 - 21.8 mi

Top 11%
×7story building
+17ft-86ft

Overall

3187

Males

2929

M18-39

2929

35K→23M

21.8 - 23.0 mi

Top 9%
×5story building
+23ft-63ft

Overall

2539

Males

2350

M18-39

2350

23M→24M

23.0 - 24.0 mi

Top 11%
×6story building
+12ft-82ft

Overall

3004

Males

2728

M18-39

2728

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2521

Males

2303

M18-39

2303

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2978

Males

2657

M18-39

2657

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2story building
+22ft-21ft

Overall

2718

Males

2448

M18-39

2448

Passing Analysis

Category:
Athletes Passed
2061
Passed By
423
Net Change
+1638
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5262
5K → 10K182165+17#5262#5245
10K → 15K38521+364#5245#4881
15K → 20K19159+132#4881#4749
20K → Half1433-19#4749#4768
Half → 25K19430+164#4768#4604
25K → 30K30817+291#4604#4313
30K → 20M13420+114#4313#4199
20M → 21M9522+73#4199#4126
21M → 35K6215+47#4126#4079
35K → 23M1602+158#4079#3921
23M → 24M8912+77#3921#3844
24M → 40K8712+75#3844#3769
40K → 25.2M366+30#3769#3739
25.2M → Finish1249+115#3739#3624
TOTALS2061423+1638
📊

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