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BOSTON MARATHON 2025

Brian Spencer

Bib: 27719•M

MA

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

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
10:26/mi
32:24
↑ 97↓ 3451.5%
10K· 6.21 mi
10:00/mi
1:03:28
↑ 79↓ 1380.4%
15K· 9.32 mi
10:25/mi
1:35:51
↑ 67↓ 78
20K· 12.43 mi
11:00/mi
2:10:02
↑ 106↓ 860.1%
Half· 13.11 mi
10:14/mi
2:17:01
↑ 19↓ 370.5%
25K· 15.53 mi
11:37/mi
2:45:11
↑ 66↓ 880.2%
30K· 18.64 mi
12:37/mi
3:24:22
↑ 181↓ 1480.2%
20M
11:32/mi
3:40:02
↑ 64↓ 500.2%
21M
13:03/mi
3:53:05
↑ 106↓ 241.6%
35K· 21.75 mi
11:42/mi
4:01:50
↑ 17↓ 861.7%
23M
12:33/mi
4:17:33
↑ 23↓ 630.6%
24M
12:21/mi
4:29:54
↓ 821.3%
40K· 24.85 mi
12:36/mi
4:40:40
↓ 200.3%
25.2M
12:48/mi
4:45:05
↑ 13↓ 160.2%
Finish· 26.22 mi
10:25/mi
4:55:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:17:01
Pace10:27 /mi
2nd Half
Distance13.11 mi
Time2:38:41
Pace12:06 /mi
📊Positive Split: 15.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:3832:2410:2632:24
10:26
-
10K
6.21 mi12:20:421:03:2810:1331:04
10:00
-0:26
15K
9.32 mi12:53:051:35:5110:1732:23
10:25
+0:25
20K
12.43 mi13:27:162:10:0210:2834:11
11:00
+0:35
Half
13.11 mi13:34:152:17:0110:276:59
10:14
-0:46
25K
15.53 mi14:02:252:45:1110:3828:10
11:37
+1:23
30K
18.64 mi14:41:363:24:2210:5839:11
12:37
+1:00
20M
20.00 mi14:57:163:40:0211:0015:40
11:32
-1:05
21M
21.00 mi15:10:193:53:0511:0613:03
13:03
+1:31
35K
21.75 mi15:19:044:01:5011:078:45
11:42
-1:21
23M
23.00 mi15:34:474:17:3311:1215:43
12:33
+0:51
24M
24.00 mi15:47:084:29:5411:1512:21
12:21
-0:12
40K
24.85 mi15:57:544:40:4011:1810:46
12:36
+0:15
25.2M
25.20 mi16:02:194:45:0511:194:25
12:48
+0:12
Finish
26.22 mi16:12:564:55:4211:1710:37
10:25
-2:23

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

10:00 /mi

Average Pace

11:17 /mi

Slowest Pace

13:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:27:38

50% of race

Time at Steady Pace

52:35

18% of race

Time at Slower Pace

1:35:29

32% of race

Average Pace: 11:17 /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 mi11:49:3832:2410:2632:24
10:26
#26611
10K
6.21 mi12:20:421:03:2810:1331:04
10:00
#25941
15K
9.32 mi12:53:051:35:5110:1732:23
10:25
#25884
20K
12.43 mi13:27:162:10:0210:2834:11
11:00
#25910
Half
13.11 mi13:34:152:17:0110:276:59
10:14
#25890
25K
15.53 mi14:02:252:45:1110:3828:10
11:37
#25924
30K
18.64 mi14:41:363:24:2210:5839:11
12:37
#26006
20M
20.00 mi14:57:163:40:0211:0015:40
11:32
#25914
21M
21.00 mi15:10:193:53:0511:0613:03
13:03
#25881
35K
21.75 mi15:19:044:01:5011:078:45
11:42
#25876
23M
23.00 mi15:34:474:17:3311:1215:43
12:33
#25901
24M
24.00 mi15:47:084:29:5411:1512:21
12:21
#25918
40K
24.85 mi15:57:544:40:4011:1810:46
12:36
#25941
25.2M
25.20 mi16:02:194:45:0511:194:25
12:48
#25927
Finish
26.22 mi16:12:564:55:4211:1710:37
10:25
#25890
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi26611154391543925800(Top 91%)15060(Top 94%)15060(Top 267%)
10K6.21 mi3.10 mi25941+67015138+30115138+30125320(Top 89%)14844(Top 92%)14844(Top 263%)
15K9.32 mi3.11 mi25884+5715106+3215106+3225800(Top 91%)15060(Top 94%)15060(Top 267%)
20K12.43 mi3.11 mi25910-2615107-115107-126002(Top 92%)15124(Top 94%)15124(Top 268%)
Half13.11 mi0.68 mi25890+2015097+1015097+1025322(Top 89%)14815(Top 92%)14815(Top 263%)
25K15.53 mi2.42 mi25924-3415105-815105-825998(Top 92%)15068(Top 94%)15068(Top 267%)
30K18.64 mi3.11 mi26006-8215109-415109-426280(Top 93%)15102(Top 94%)15102(Top 268%)
20M20.00 mi1.36 mi25914+9215061+4815061+4824583(Top 87%)14263(Top 89%)14263(Top 253%)
21M21.00 mi1.00 mi25881+3315026+3515026+3525102(Top 88%)14426(Top 90%)14426(Top 256%)
35K21.75 mi0.75 mi25876+515024+215024+225409(Top 89%)14544(Top 90%)14544(Top 258%)
23M23.00 mi1.25 mi25901-2515027-315027-325865(Top 91%)14767(Top 92%)14767(Top 262%)
24M24.00 mi1.00 mi25918-1715026+115026+126126(Top 92%)14867(Top 92%)14867(Top 264%)
40K24.85 mi0.85 mi25941-2315033-715033-725788(Top 91%)14688(Top 91%)14688(Top 260%)
25.2M25.20 mi0.35 mi25927+1415015+1815015+1824757(Top 87%)14149(Top 88%)14149(Top 251%)
Finish26.22 mi1.02 mi25890+3714988+2714988+2724094(Top 85%)13816(Top 86%)13816(Top 245%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×21story building
+97ft-345ft

Overall

25800

Males

15060

M18-39

15060

5K→10K

3.1 - 6.2 mi

Top 89%
×5story building
+79ft-138ft

Overall

25320

Males

14844

M18-39

14844

10K→15K

6.2 - 9.3 mi

Top 91%
×3story building
+67ft-78ft

Overall

25800

Males

15060

M18-39

15060

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

26002

Males

15124

M18-39

15124

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

25322

Males

14815

M18-39

14815

Half→25K

13.1 - 15.5 mi

Top 92%
×4story building
+66ft-88ft

Overall

25998

Males

15068

M18-39

15068

25K→30K

15.5 - 18.6 mi

Top 93%
×9story building
+181ft-148ft

Overall

26280

Males

15102

M18-39

15102

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

24583

Males

14263

M18-39

14263

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

25102

Males

14426

M18-39

14426

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

25409

Males

14544

M18-39

14544

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

25865

Males

14767

M18-39

14767

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

26126

Males

14867

M18-39

14867

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

25788

Males

14688

M18-39

14688

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24757

Males

14149

M18-39

14149

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2story building
+22ft-21ft

Overall

24094

Males

13816

M18-39

13816

Passing Analysis

Category:
Athletes Passed
1478
Passed By
757
Net Change
+721
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26611
5K → 10K68212+670#26611#25941
10K → 15K15194+57#25941#25884
15K → 20K121147-26#25884#25910
20K → Half277+20#25910#25890
Half → 25K76110-34#25890#25924
25K → 30K83165-82#25924#26006
30K → 20M10614+92#26006#25914
20M → 21M6532+33#25914#25881
21M → 35K3126+5#25881#25876
35K → 23M2752-25#25876#25901
23M → 24M2340-17#25901#25918
24M → 40K1740-23#25918#25941
40K → 25.2M206+14#25941#25927
25.2M → Finish4912+37#25927#25890
TOTALS1478757+721
📊

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