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BOSTON MARATHON 2025

Samuel Spencer

Bib: 4533•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 24%
Gender (Male)
#0 / 16105
Top 36%
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
20:14
Rank: #3937
Start → 5K
20:14 | 6:31/mi
10K· 6.21 mi
40:14
Rank: #3602 (+335)
5K → 10K
20:00 | 6:26/mi
15K· 9.32 mi
1:00:06
Rank: #3312 (+290)
10K → 15K
19:52 | 6:24/mi
20K· 12.43 mi
1:20:15
Rank: #3218 (+94)
15K → 20K
20:09 | 6:29/mi
Half· 13.11 mi
1:24:42
Rank: #3239 (-21)
20K → Half
4:27 | 6:31/mi
25K· 15.53 mi
1:43:52
Rank: #4680 (-1441)
Half → 25K
19:10 | 7:54/mi
30K· 18.64 mi
2:08:42
Rank: #6005 (-1325)
25K → 30K
24:50 | 8:00/mi
20M
2:18:55
Rank: #6038 (-33)
30K → 20M
10:13 | 7:31/mi
21M
2:26:49
Rank: #6028 (+10)
20M → 21M
7:54 | 7:54/mi
35K· 21.75 mi
2:32:15
Rank: #6041 (-13)
21M → 35K
5:26 | 7:16/mi
23M
2:42:19
Rank: #6156 (-115)
35K → 23M
10:04 | 8:02/mi
24M
2:50:16
Rank: #6278 (-122)
23M → 24M
7:57 | 7:57/mi
40K· 24.85 mi
2:57:41
Rank: #6492 (-214)
24M → 40K
7:25 | 8:40/mi
25.2M
3:00:47
Rank: #6545 (-53)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
3:08:58
Rank: #6754 (-209)
25.2M → Finish
8:11 | 8:02/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:42
Pace6:28 /mi
2nd Half
Distance13.11 mi
Time1:44:16
Pace7:57 /mi
📊Positive Split: 23.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1920:146:3120:14
6:31
-
10K
6.21 mi10:44:1940:146:2820:00
6:26
-0:05
15K
9.32 mi11:04:111:00:066:2719:52
6:24
-0:02
20K
12.43 mi11:24:201:20:156:2720:09
6:29
+0:05
Half
13.11 mi11:28:471:24:426:284:27
6:31
+0:02
25K
15.53 mi11:47:571:43:526:4119:10
7:54
+1:23
30K
18.64 mi12:12:472:08:426:5424:50
8:00
+0:06
20M
20.00 mi12:23:002:18:556:5710:13
7:31
-0:29
21M
21.00 mi12:30:542:26:496:597:54
7:54
+0:23
35K
21.75 mi12:36:202:32:157:005:26
7:16
-0:38
23M
23.00 mi12:46:242:42:197:0310:04
8:02
+0:46
24M
24.00 mi12:54:212:50:167:067:57
7:57
-0:05
40K
24.85 mi13:01:462:57:417:097:25
8:40
+0:43
25.2M
25.20 mi13:04:523:00:477:103:06
8:59
+0:19
Finish
26.22 mi13:13:033:08:587:138:11
8:02
-0:57

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

6:24 /mi

Average Pace

7:13 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:08

48% of race

Time at Steady Pace

1:28:19

47% of race

Time at Slower Pace

10:31

6% of race

Average Pace: 7:12 /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 mi10:24:1920:146:3120:14
6:31
#3937
10K
6.21 mi10:44:1940:146:2820:00
6:26
#3602
15K
9.32 mi11:04:111:00:066:2719:52
6:24
#3312
20K
12.43 mi11:24:201:20:156:2720:09
6:29
#3218
Half
13.11 mi11:28:471:24:426:284:27
6:31
#3239
25K
15.53 mi11:47:571:43:526:4119:10
7:54
#4680
30K
18.64 mi12:12:472:08:426:5424:50
8:00
#6005
20M
20.00 mi12:23:002:18:556:5710:13
7:31
#6038
21M
21.00 mi12:30:542:26:496:597:54
7:54
#6028
35K
21.75 mi12:36:202:32:157:005:26
7:16
#6041
23M
23.00 mi12:46:242:42:197:0310:04
8:02
#6156
24M
24.00 mi12:54:212:50:167:067:57
7:57
#6278
40K
24.85 mi13:01:462:57:417:097:25
8:40
#6492
25.2M
25.20 mi13:04:523:00:477:103:06
8:59
#6545
Finish
26.22 mi13:13:033:08:587:138:11
8:02
#6754
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3937372737272920(Top 10%)2784(Top 17%)2784(Top 49%)
10K6.21 mi3.10 mi3602+3353417+3103417+3103302(Top 12%)3139(Top 19%)3139(Top 56%)
15K9.32 mi3.11 mi3312+2903147+2703147+2702920(Top 10%)2784(Top 17%)2784(Top 49%)
20K12.43 mi3.11 mi3218+943065+823065+823056(Top 11%)2908(Top 18%)2908(Top 52%)
Half13.11 mi0.68 mi3239-213085-203085-203893(Top 14%)3673(Top 23%)3673(Top 65%)
25K15.53 mi2.42 mi4680-14414361-12764361-127613103(Top 46%)9334(Top 58%)9334(Top 165%)
30K18.64 mi3.11 mi6005-13255444-10835444-108311308(Top 40%)8340(Top 52%)8340(Top 148%)
20M20.00 mi1.36 mi6038-335449-55449-57121(Top 25%)5916(Top 37%)5916(Top 105%)
21M21.00 mi1.00 mi6028+105426+235426+236781(Top 24%)5552(Top 34%)5552(Top 98%)
35K21.75 mi0.75 mi6041-135423+35423+36969(Top 25%)5679(Top 35%)5679(Top 101%)
23M23.00 mi1.25 mi6156-1155499-765499-7610281(Top 36%)7365(Top 46%)7365(Top 131%)
24M24.00 mi1.00 mi6278-1225571-725571-7210849(Top 38%)7585(Top 47%)7585(Top 134%)
40K24.85 mi0.85 mi6492-2145698-1275698-12714424(Top 51%)9173(Top 57%)9173(Top 163%)
25.2M25.20 mi0.35 mi6545-535717-195717-1911642(Top 41%)7776(Top 48%)7776(Top 138%)
Finish26.22 mi1.02 mi6754-2095831-1145831-11413036(Top 46%)8537(Top 53%)8537(Top 151%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2920

Males

2784

M18-39

2784

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3302

Males

3139

M18-39

3139

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2920

Males

2784

M18-39

2784

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

3056

Males

2908

M18-39

2908

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3893

Males

3673

M18-39

3673

Half→25K

13.1 - 15.5 mi

Top 46%
×4stories
+66ft-88ft

Overall

13103

Males

9334

M18-39

9334

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

11308

Males

8340

M18-39

8340

30K→20M

18.6 - 20.0 mi

Top 25%
×5stories
+64ft-50ft

Overall

7121

Males

5916

M18-39

5916

20M→21M

20.0 - 21.0 mi

Top 24%
×8stories
+106ft-24ft

Overall

6781

Males

5552

M18-39

5552

21M→35K

21.0 - 21.8 mi

Top 25%
×7stories
+17ft-86ft

Overall

6969

Males

5679

M18-39

5679

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10281

Males

7365

M18-39

7365

23M→24M

23.0 - 24.0 mi

Top 38%
×6stories
+12ft-82ft

Overall

10849

Males

7585

M18-39

7585

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14424

Males

9173

M18-39

9173

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11642

Males

7776

M18-39

7776

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

13036

Males

8537

M18-39

8537

Passing Analysis

Category:
Athletes Passed
1137
Passed By
3954
Net Change
-2817
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3937
5K → 10K36934+335#3937#3602
10K → 15K2999+290#3602#3312
15K → 20K13642+94#3312#3218
20K → Half627-21#3218#3239
Half → 25K21443-1441#3239#4680
25K → 30K221347-1325#4680#6005
30K → 20M6194-33#6005#6038
20M → 21M7565+10#6038#6028
21M → 35K3750-13#6028#6041
35K → 23M56171-115#6041#6156
23M → 24M24146-122#6156#6278
24M → 40K16230-214#6278#6492
40K → 25.2M1568-53#6492#6545
25.2M → Finish19228-209#6545#6754
TOTALS11373954-2817
📊

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