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BOSTON MARATHON 2025

David Nelson

Bib: 21268•M

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
Top 36%
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
8:19/mi
25:50
↑ 97↓ 3451.5%
10K· 6.21 mi
8:22/mi
51:50
↑ 79↓ 1380.4%
15K· 9.32 mi
8:20/mi
1:17:44
↑ 67↓ 78
20K· 12.43 mi
8:26/mi
1:43:56
↑ 106↓ 860.1%
Half· 13.11 mi
8:18/mi
1:49:36
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:10:25
↑ 66↓ 880.2%
30K· 18.64 mi
8:44/mi
2:37:34
↑ 181↓ 1480.2%
20M
8:49/mi
2:49:33
↑ 64↓ 500.2%
21M
9:20/mi
2:58:53
↑ 106↓ 241.6%
35K· 21.75 mi
8:39/mi
3:05:21
↑ 17↓ 861.7%
23M
8:44/mi
3:16:17
↑ 23↓ 630.6%
24M
8:28/mi
3:24:45
↓ 821.3%
40K· 24.85 mi
8:32/mi
3:32:03
↓ 200.3%
25.2M
9:17/mi
3:35:15
↑ 13↓ 160.2%
Finish· 26.22 mi
8:14/mi
3:43:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:36
Pace8:22 /mi
2nd Half
Distance13.11 mi
Time1:54:02
Pace8:42 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:1525:508:1925:50
8:19
-
10K
6.21 mi11:45:1551:508:2126:00
8:22
+0:03
15K
9.32 mi12:11:091:17:448:2025:54
8:20
-0:02
20K
12.43 mi12:37:211:43:568:2226:12
8:26
+0:06
Half
13.11 mi12:43:011:49:368:225:40
8:18
-0:08
25K
15.53 mi13:03:502:10:258:2420:49
8:35
+0:17
30K
18.64 mi13:30:592:37:348:2727:09
8:44
+0:09
20M
20.00 mi13:42:582:49:338:2911:59
8:49
+0:05
21M
21.00 mi13:52:182:58:538:319:20
9:20
+0:31
35K
21.75 mi13:58:463:05:218:316:28
8:39
-0:41
23M
23.00 mi14:09:423:16:178:3210:56
8:44
+0:05
24M
24.00 mi14:18:103:24:458:328:28
8:28
-0:16
40K
24.85 mi14:25:283:32:038:327:18
8:32
+0:04
25.2M
25.20 mi14:28:403:35:158:333:12
9:17
+0:45
Finish
26.22 mi14:37:033:43:388:328:23
8:14
-1:03

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

8:14 /mi

Average Pace

8:32 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:31:06

94% of race

Time at Steady Pace

12:32

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:32 /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 mi11:19:1525:508:1925:50
8:19
#18794
10K
6.21 mi11:45:1551:508:2126:00
8:22
#18859
15K
9.32 mi12:11:091:17:448:2025:54
8:20
#18640
20K
12.43 mi12:37:211:43:568:2226:12
8:26
#18405
Half
13.11 mi12:43:011:49:368:225:40
8:18
#18367
25K
15.53 mi13:03:502:10:258:2420:49
8:35
#18232
30K
18.64 mi13:30:592:37:348:2727:09
8:44
#17803
20M
20.00 mi13:42:582:49:338:2911:59
8:49
#17620
21M
21.00 mi13:52:182:58:538:319:20
9:20
#17482
35K
21.75 mi13:58:463:05:218:316:28
8:39
#17417
23M
23.00 mi14:09:423:16:178:3210:56
8:44
#17250
24M
24.00 mi14:18:103:24:458:328:28
8:28
#17107
40K
24.85 mi14:25:283:32:038:327:18
8:32
#16963
25.2M
25.20 mi14:28:403:35:158:333:12
9:17
#16893
Finish
26.22 mi14:37:033:43:388:328:23
8:14
#16778
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi18794119461194618290(Top 64%)11750(Top 73%)11750(Top 933%)
10K6.21 mi3.10 mi18859-6511978-3211978-3218979(Top 67%)12050(Top 75%)12050(Top 957%)
15K9.32 mi3.11 mi18640+21911885+9311885+9318290(Top 64%)11750(Top 73%)11750(Top 933%)
20K12.43 mi3.11 mi18405+23511781+10411781+10417745(Top 62%)11502(Top 71%)11502(Top 914%)
Half13.11 mi0.68 mi18367+3811764+1711764+1717914(Top 63%)11584(Top 72%)11584(Top 920%)
25K15.53 mi2.42 mi18232+13511691+7311691+7317706(Top 62%)11403(Top 71%)11403(Top 906%)
30K18.64 mi3.11 mi17803+42911465+22611465+22616220(Top 57%)10579(Top 66%)10579(Top 840%)
20M20.00 mi1.36 mi17620+18311352+11311352+11315756(Top 55%)10262(Top 64%)10262(Top 815%)
21M21.00 mi1.00 mi17482+13811273+7911273+7915301(Top 54%)9916(Top 62%)9916(Top 788%)
35K21.75 mi0.75 mi17417+6511220+5311220+5316305(Top 57%)10314(Top 64%)10314(Top 819%)
23M23.00 mi1.25 mi17250+16711118+10211118+10214724(Top 52%)9502(Top 59%)9502(Top 755%)
24M24.00 mi1.00 mi17107+14311044+7411044+7414289(Top 50%)9288(Top 58%)9288(Top 738%)
40K24.85 mi0.85 mi16963+14410953+9110953+9113669(Top 48%)8850(Top 55%)8850(Top 703%)
25.2M25.20 mi0.35 mi16893+7010907+4610907+4613333(Top 47%)8639(Top 54%)8639(Top 686%)
Finish26.22 mi1.02 mi16778+11510838+6910838+6914441(Top 51%)9235(Top 57%)9235(Top 734%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

18290

Males

11750

M60-64

11750

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

18979

Males

12050

M60-64

12050

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

18290

Males

11750

M60-64

11750

15K→20K

9.3 - 12.4 mi

Top 62%
×5story building
+106ft-86ft

Overall

17745

Males

11502

M60-64

11502

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

17914

Males

11584

M60-64

11584

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17706

Males

11403

M60-64

11403

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16220

Males

10579

M60-64

10579

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15756

Males

10262

M60-64

10262

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

15301

Males

9916

M60-64

9916

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

16305

Males

10314

M60-64

10314

35K→23M

21.8 - 23.0 mi

Top 52%
×5story building
+23ft-63ft

Overall

14724

Males

9502

M60-64

9502

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

14289

Males

9288

M60-64

9288

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13669

Males

8850

M60-64

8850

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13333

Males

8639

M60-64

8639

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

14441

Males

9235

M60-64

9235

Passing Analysis

Category:
Athletes Passed
2848
Passed By
832
Net Change
+2016
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18794
5K → 10K228293-65#18794#18859
10K → 15K31697+219#18859#18640
15K → 20K31378+235#18640#18405
20K → Half6022+38#18405#18367
Half → 25K23297+135#18367#18232
25K → 30K47546+429#18232#17803
30K → 20M20724+183#17803#17620
20M → 21M18042+138#17620#17482
21M → 35K9530+65#17482#17417
35K → 23M20134+167#17417#17250
23M → 24M15916+143#17250#17107
24M → 40K16117+144#17107#16963
40K → 25.2M766+70#16963#16893
25.2M → Finish14530+115#16893#16778
TOTALS2848832+2016
📊

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