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BOSTON MARATHON 2025

Nathaniel Sennett

Bib: 31908•M

CA

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

Start
0:00:00
Race begins
5K· 3.11 mi
30:29
Rank: #25117
Start → 5K
9:49/mi
30:29 split
10K· 6.21 mi
1:03:07
Rank: #25812 (-695)
5K → 10K
10:30/mi
32:38 split
15K· 9.32 mi
1:34:44
Rank: #25648 (+164)
10K → 15K
10:11/mi
31:37 split
20K· 12.43 mi
2:06:35
Rank: #25409 (+239)
15K → 20K
10:15/mi
31:51 split
Half· 13.11 mi
2:13:33
Rank: #25389 (+20)
20K → Half
10:13/mi
6:58 split
25K· 15.53 mi
2:40:50
Rank: #25426 (-37)
Half → 25K
11:15/mi
27:17 split
30K· 18.64 mi
3:22:04
Rank: #25820 (-394)
25K → 30K
13:16/mi
41:14 split
20M
3:39:44
Rank: #25893 (-73)
30K → 20M
13:00/mi
17:40 split
21M
3:52:43
Rank: #25853 (+40)
20M → 21M
12:59/mi
12:59 split
35K· 21.75 mi
4:01:42
Rank: #25866 (-13)
21M → 35K
12:00/mi
8:59 split
23M
4:16:51
Rank: #25846 (+20)
35K → 23M
12:06/mi
15:09 split
24M
4:29:17
Rank: #25890 (-44)
23M → 24M
12:26/mi
12:26 split
40K· 24.85 mi
4:40:32
Rank: #25930 (-40)
24M → 40K
13:09/mi
11:15 split
25.2M
4:45:10
Rank: #25930
40K → 25.2M
13:26/mi
4:38 split
Finish· 26.22 mi
4:57:07
Rank: #25983 (-53)
25.2M → Finish
11:44/mi
11:57 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:13:33
Pace10:11 /mi
2nd Half
Distance13.11 mi
Time2:43:34
Pace12:29 /mi
📊Positive Split: 22.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:1330:299:4930:29
9:49
-
10K
6.21 mi12:24:511:03:0710:0932:38
10:30
+0:41
15K
9.32 mi12:56:281:34:4410:1031:37
10:11
-0:19
20K
12.43 mi13:28:192:06:3510:1131:51
10:15
+0:04
Half
13.11 mi13:35:172:13:3310:116:58
10:13
-0:02
25K
15.53 mi14:02:342:40:5010:2127:17
11:15
+1:02
30K
18.64 mi14:43:483:22:0410:5041:14
13:16
+2:01
20M
20.00 mi15:01:283:39:4410:5917:40
13:00
-0:16
21M
21.00 mi15:14:273:52:4311:0512:59
12:59
-0:01
35K
21.75 mi15:23:264:01:4211:078:59
12:00
-0:59
23M
23.00 mi15:38:354:16:5111:1015:09
12:06
+0:06
24M
24.00 mi15:51:014:29:1711:1312:26
12:26
+0:20
40K
24.85 mi16:02:164:40:3211:1711:15
13:09
+0:43
25.2M
25.20 mi16:06:544:45:1011:194:38
13:26
+0:17
Finish
26.22 mi16:18:514:57:0711:2011:57
11:44
-1:42

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

9:49 /mi

Average Pace

11:20 /mi

Slowest Pace

13:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:40:50

54% of race

Time at Steady Pace

48:31

16% of race

Time at Slower Pace

1:27:46

30% of race

Average Pace: 11:20 /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 mi11:52:1330:299:4930:29
9:49
#25117
10K
6.21 mi12:24:511:03:0710:0932:38
10:30
#25812
15K
9.32 mi12:56:281:34:4410:1031:37
10:11
#25648
20K
12.43 mi13:28:192:06:3510:1131:51
10:15
#25409
Half
13.11 mi13:35:172:13:3310:116:58
10:13
#25389
25K
15.53 mi14:02:342:40:5010:2127:17
11:15
#25426
30K
18.64 mi14:43:483:22:0410:5041:14
13:16
#25820
20M
20.00 mi15:01:283:39:4410:5917:40
13:00
#25893
21M
21.00 mi15:14:273:52:4311:0512:59
12:59
#25853
35K
21.75 mi15:23:264:01:4211:078:59
12:00
#25866
23M
23.00 mi15:38:354:16:5111:1015:09
12:06
#25846
24M
24.00 mi15:51:014:29:1711:1312:26
12:26
#25890
40K
24.85 mi16:02:164:40:3211:1711:15
13:09
#25930
25.2M
25.20 mi16:06:544:45:1011:194:38
13:26
#25930
Finish
26.22 mi16:18:514:57:0711:2011:57
11:44
#25983
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25117147831478325364(Top 89%)14865(Top 92%)14865(Top 263%)
10K6.21 mi3.10 mi25812-69515080-29715080-29726265(Top 92%)15256(Top 95%)15256(Top 270%)
15K9.32 mi3.11 mi25648+16414994+8614994+8625364(Top 89%)14865(Top 92%)14865(Top 263%)
20K12.43 mi3.11 mi25409+23914883+11114883+11124747(Top 87%)14559(Top 90%)14559(Top 258%)
Half13.11 mi0.68 mi25389+2014876+714876+725277(Top 89%)14795(Top 92%)14795(Top 262%)
25K15.53 mi2.42 mi25426-37148761487625552(Top 90%)14885(Top 92%)14885(Top 264%)
30K18.64 mi3.11 mi25820-39415024-14815024-14826934(Top 95%)15412(Top 96%)15412(Top 273%)
20M20.00 mi1.36 mi25893-7315049-2515049-2526442(Top 93%)15123(Top 94%)15123(Top 268%)
21M21.00 mi1.00 mi25853+4015015+3415015+3425025(Top 88%)14379(Top 89%)14379(Top 255%)
35K21.75 mi0.75 mi25866-1315019-415019-425872(Top 91%)14770(Top 92%)14770(Top 262%)
23M23.00 mi1.25 mi25846+2015002+1715002+1725267(Top 89%)14462(Top 90%)14462(Top 256%)
24M24.00 mi1.00 mi25890-4415011-915011-926233(Top 92%)14931(Top 93%)14931(Top 265%)
40K24.85 mi0.85 mi25930-4015024-1315024-1326450(Top 93%)15023(Top 93%)15023(Top 266%)
25.2M25.20 mi0.35 mi2593015017+715017+725597(Top 90%)14536(Top 90%)14536(Top 258%)
Finish26.22 mi1.02 mi25983-5315032-1515032-1526453(Top 93%)15021(Top 93%)15021(Top 266%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

25364

Males

14865

M18-39

14865

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

26265

Males

15256

M18-39

15256

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

25364

Males

14865

M18-39

14865

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

24747

Males

14559

M18-39

14559

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

25277

Males

14795

M18-39

14795

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

25552

Males

14885

M18-39

14885

25K→30K

15.5 - 18.6 mi

Top 95%
×9story building
+181ft-148ft

Overall

26934

Males

15412

M18-39

15412

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

26442

Males

15123

M18-39

15123

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

25025

Males

14379

M18-39

14379

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

25872

Males

14770

M18-39

14770

35K→23M

21.8 - 23.0 mi

Top 89%
×5story building
+23ft-63ft

Overall

25267

Males

14462

M18-39

14462

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

26233

Males

14931

M18-39

14931

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

26450

Males

15023

M18-39

15023

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

25597

Males

14536

M18-39

14536

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

26453

Males

15021

M18-39

15021

Passing Analysis

Category:
Athletes Passed
891
Passed By
1757
Net Change
-866
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25117
5K → 10K42737-695#25117#25812
10K → 15K22258+164#25812#25648
15K → 20K26021+239#25648#25409
20K → Half3111+20#25409#25389
Half → 25K86123-37#25389#25426
25K → 30K25419-394#25426#25820
30K → 20M34107-73#25820#25893
20M → 21M6828+40#25893#25853
21M → 35K2134-13#25853#25866
35K → 23M4828+20#25866#25846
23M → 24M1660-44#25846#25890
24M → 40K1454-40#25890#25930
40K → 25.2M15150#25930#25930
25.2M → Finish962-53#25930#25983
TOTALS8911757-866
📊

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