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BOSTON MARATHON 2025

Adam Nelson

Bib: 2644•M

WI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 22%
Division (M18-39)
#0 / 5642
Top 46%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:21
Rank: #2018
Start → 5K
6:14/mi
19:21 split
10K· 6.21 mi
38:20
Rank: #1725 (+293)
5K → 10K
6:07/mi
18:59 split
15K· 9.32 mi
57:26
Rank: #1662 (+63)
10K → 15K
6:09/mi
19:06 split
20K· 12.43 mi
1:17:24
Rank: #1888 (-226)
15K → 20K
6:26/mi
19:58 split
Half· 13.11 mi
1:21:49
Rank: #1961 (-73)
20K → Half
6:28/mi
4:25 split
25K· 15.53 mi
1:38:04
Rank: #2249 (-288)
Half → 25K
6:42/mi
16:15 split
30K· 18.64 mi
1:59:56
Rank: #2629 (-380)
25K → 30K
7:02/mi
21:52 split
20M
2:10:07
Rank: #2912 (-283)
30K → 20M
7:30/mi
10:11 split
21M
2:18:03
Rank: #3083 (-171)
20M → 21M
7:56/mi
7:56 split
35K· 21.75 mi
2:23:28
Rank: #3183 (-100)
21M → 35K
7:14/mi
5:25 split
23M
2:33:07
Rank: #3394 (-211)
35K → 23M
7:42/mi
9:39 split
24M
2:40:40
Rank: #3559 (-165)
23M → 24M
7:33/mi
7:33 split
40K· 24.85 mi
2:47:02
Rank: #3658 (-99)
24M → 40K
7:27/mi
6:22 split
25.2M
2:49:48
Rank: #3682 (-24)
40K → 25.2M
8:01/mi
2:46 split
Finish· 26.22 mi
2:57:08
Rank: #3772 (-90)
25.2M → Finish
7:12/mi
7:20 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:49
Pace6:14 /mi
2nd Half
Distance13.11 mi
Time1:35:19
Pace7:16 /mi
📊Positive Split: 16.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:3019:216:1419:21
6:14
-
10K
6.21 mi10:39:2938:206:1018:59
6:07
-0:07
15K
9.32 mi10:58:3557:266:1019:06
6:09
+0:02
20K
12.43 mi11:18:331:17:246:1419:58
6:26
+0:17
Half
13.11 mi11:22:581:21:496:144:25
6:28
+0:02
25K
15.53 mi11:39:131:38:046:1916:15
6:42
+0:14
30K
18.64 mi12:01:051:59:566:2621:52
7:02
+0:20
20M
20.00 mi12:11:162:10:076:3010:11
7:30
+0:28
21M
21.00 mi12:19:122:18:036:347:56
7:56
+0:26
35K
21.75 mi12:24:372:23:286:365:25
7:14
-0:42
23M
23.00 mi12:34:162:33:076:399:39
7:42
+0:28
24M
24.00 mi12:41:492:40:406:427:33
7:33
-0:09
40K
24.85 mi12:48:112:47:026:436:22
7:27
-0:06
25.2M
25.20 mi12:50:572:49:486:442:46
8:01
+0:34
Finish
26.22 mi12:58:172:57:086:467:20
7:12
-0:49

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

6:07 /mi

Average Pace

6:46 /mi

Slowest Pace

8:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:04

55% of race

Time at Steady Pace

51:10

29% of race

Time at Slower Pace

27:54

16% of race

Average Pace: 6:45 /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 mi10:20:3019:216:1419:21
6:14
#2018
10K
6.21 mi10:39:2938:206:1018:59
6:07
#1725
15K
9.32 mi10:58:3557:266:1019:06
6:09
#1662
20K
12.43 mi11:18:331:17:246:1419:58
6:26
#1888
Half
13.11 mi11:22:581:21:496:144:25
6:28
#1961
25K
15.53 mi11:39:131:38:046:1916:15
6:42
#2249
30K
18.64 mi12:01:051:59:566:2621:52
7:02
#2629
20M
20.00 mi12:11:162:10:076:3010:11
7:30
#2912
21M
21.00 mi12:19:122:18:036:347:56
7:56
#3083
35K
21.75 mi12:24:372:23:286:365:25
7:14
#3183
23M
23.00 mi12:34:162:33:076:399:39
7:42
#3394
24M
24.00 mi12:41:492:40:406:427:33
7:33
#3559
40K
24.85 mi12:48:112:47:026:436:22
7:27
#3658
25.2M
25.20 mi12:50:572:49:486:442:46
8:01
#3682
Finish
26.22 mi12:58:172:57:086:467:20
7:12
#3772
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2018192119211598(Top 6%)1517(Top 9%)1517(Top 27%)
10K6.21 mi3.10 mi1725+2931640+2811640+2811508(Top 5%)1431(Top 9%)1431(Top 25%)
15K9.32 mi3.11 mi1662+631582+581582+581598(Top 6%)1517(Top 9%)1517(Top 27%)
20K12.43 mi3.11 mi1888-2261799-2171799-2172666(Top 9%)2536(Top 16%)2536(Top 45%)
Half13.11 mi0.68 mi1961-731871-721871-723482(Top 12%)3298(Top 20%)3298(Top 58%)
25K15.53 mi2.42 mi2249-2882146-2752146-2754132(Top 15%)3844(Top 24%)3844(Top 68%)
30K18.64 mi3.11 mi2629-3802508-3622508-3624915(Top 17%)4463(Top 28%)4463(Top 79%)
20M20.00 mi1.36 mi2912-2832771-2632771-2636921(Top 24%)5774(Top 36%)5774(Top 102%)
21M21.00 mi1.00 mi3083-1712920-1492920-1496935(Top 24%)5625(Top 35%)5625(Top 100%)
35K21.75 mi0.75 mi3183-1003010-903010-906807(Top 24%)5566(Top 35%)5566(Top 99%)
23M23.00 mi1.25 mi3394-2113197-1873197-1877903(Top 28%)6097(Top 38%)6097(Top 108%)
24M24.00 mi1.00 mi3559-1653339-1423339-1428003(Top 28%)6098(Top 38%)6098(Top 108%)
40K24.85 mi0.85 mi3658-993414-753414-756436(Top 23%)5092(Top 32%)5092(Top 90%)
25.2M25.20 mi0.35 mi3682-243435-213435-215956(Top 21%)4682(Top 29%)4682(Top 83%)
Finish26.22 mi1.02 mi3772-903503-683503-686980(Top 25%)5310(Top 33%)5310(Top 94%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21stories
+97ft-345ft

Overall

1598

Males

1517

M18-39

1517

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1508

Males

1431

M18-39

1431

10K→15K

6.2 - 9.3 mi

Top 6%
×3stories
+67ft-78ft

Overall

1598

Males

1517

M18-39

1517

15K→20K

9.3 - 12.4 mi

Top 9%
×5stories
+106ft-86ft

Overall

2666

Males

2536

M18-39

2536

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3482

Males

3298

M18-39

3298

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4132

Males

3844

M18-39

3844

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4915

Males

4463

M18-39

4463

30K→20M

18.6 - 20.0 mi

Top 24%
×5stories
+64ft-50ft

Overall

6921

Males

5774

M18-39

5774

20M→21M

20.0 - 21.0 mi

Top 24%
×8stories
+106ft-24ft

Overall

6935

Males

5625

M18-39

5625

21M→35K

21.0 - 21.8 mi

Top 24%
×7stories
+17ft-86ft

Overall

6807

Males

5566

M18-39

5566

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7903

Males

6097

M18-39

6097

23M→24M

23.0 - 24.0 mi

Top 28%
×6stories
+12ft-82ft

Overall

8003

Males

6098

M18-39

6098

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6436

Males

5092

M18-39

5092

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5956

Males

4682

M18-39

4682

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2stories
+22ft-21ft

Overall

6980

Males

5310

M18-39

5310

Passing Analysis

Category:
Athletes Passed
612
Passed By
2366
Net Change
-1754
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2018
5K → 10K31017+293#2018#1725
10K → 15K9431+63#1725#1662
15K → 20K21247-226#1662#1888
20K → Half073-73#1888#1961
Half → 25K14302-288#1961#2249
25K → 30K26406-380#2249#2629
30K → 20M13296-283#2629#2912
20M → 21M11182-171#2912#3083
21M → 35K14114-100#3083#3183
35K → 23M27238-211#3183#3394
23M → 24M13178-165#3394#3559
24M → 40K20119-99#3559#3658
40K → 25.2M2145-24#3658#3682
25.2M → Finish28118-90#3682#3772
TOTALS6122366-1754
📊

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