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BOSTON MARATHON 2025

Spencer Nagi

Bib: 26102•M

ME

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
7:33/mi
23:26
↑ 97↓ 3451.5%
10K· 6.21 mi
7:40/mi
47:14
↑ 79↓ 1380.4%
15K· 9.32 mi
7:49/mi
1:11:32
↑ 67↓ 78
20K· 12.43 mi
8:04/mi
1:36:36
↑ 106↓ 860.1%
Half· 13.11 mi
8:01/mi
1:42:04
↑ 19↓ 370.5%
25K· 15.53 mi
7:58/mi
2:01:24
↑ 66↓ 880.2%
30K· 18.64 mi
8:23/mi
2:27:26
↑ 181↓ 1480.2%
20M
8:22/mi
2:38:48
↑ 64↓ 500.2%
21M
8:50/mi
2:47:38
↑ 106↓ 241.6%
35K· 21.75 mi
8:07/mi
2:53:42
↑ 17↓ 861.7%
23M
8:54/mi
3:04:50
↑ 23↓ 630.6%
24M
8:51/mi
3:13:41
↓ 821.3%
40K· 24.85 mi
9:03/mi
3:21:25
↓ 200.3%
25.2M
10:09/mi
3:24:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:57/mi
3:34:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:04
Pace7:47 /mi
2nd Half
Distance13.11 mi
Time1:51:58
Pace8:32 /mi
📊Positive Split: 9.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:38:3023:267:3323:26
7:33
-
10K
6.21 mi12:02:1847:147:3623:48
7:40
+0:07
15K
9.32 mi12:26:361:11:327:4024:18
7:49
+0:09
20K
12.43 mi12:51:401:36:367:4625:04
8:04
+0:15
Half
13.11 mi12:57:081:42:047:475:28
8:01
-0:03
25K
15.53 mi13:16:282:01:247:4919:20
7:58
-0:03
30K
18.64 mi13:42:302:27:267:5526:02
8:23
+0:25
20M
20.00 mi13:53:522:38:487:5611:22
8:22
-0:01
21M
21.00 mi14:02:422:47:387:598:50
8:50
+0:28
35K
21.75 mi14:08:462:53:427:596:04
8:07
-0:43
23M
23.00 mi14:19:543:04:508:0211:08
8:54
+0:47
24M
24.00 mi14:28:453:13:418:048:51
8:51
-0:03
40K
24.85 mi14:36:293:21:258:067:44
9:03
+0:12
25.2M
25.20 mi14:39:593:24:558:083:30
10:09
+1:06
Finish
26.22 mi14:49:063:34:028:109:07
8:57
-1:12

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

7:33 /mi

Average Pace

8:10 /mi

Slowest Pace

10:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:20

45% of race

Time at Steady Pace

1:08:32

32% of race

Time at Slower Pace

49:10

23% of race

Average Pace: 8:10 /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 mi11:38:3023:267:3323:26
7:33
#12615
10K
6.21 mi12:02:1847:147:3623:48
7:40
#13054
15K
9.32 mi12:26:361:11:327:4024:18
7:49
#13527
20K
12.43 mi12:51:401:36:367:4625:04
8:04
#14023
Half
13.11 mi12:57:081:42:047:475:28
8:01
#14126
25K
15.53 mi13:16:282:01:247:4919:20
7:58
#14002
30K
18.64 mi13:42:302:27:267:5526:02
8:23
#13953
20M
20.00 mi13:53:522:38:487:5611:22
8:22
#13828
21M
21.00 mi14:02:422:47:387:598:50
8:50
#13719
35K
21.75 mi14:08:462:53:427:596:04
8:07
#13680
23M
23.00 mi14:19:543:04:508:0211:08
8:54
#13813
24M
24.00 mi14:28:453:13:418:048:51
8:51
#13970
40K
24.85 mi14:36:293:21:258:067:44
9:03
#14075
25.2M
25.20 mi14:39:593:24:558:083:30
10:09
#14135
Finish
26.22 mi14:49:063:34:028:109:07
8:57
#14299
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi126159465946514550(Top 51%)10167(Top 63%)10167(Top 180%)
10K6.21 mi3.10 mi13054-4399645-1809645-18013536(Top 48%)9813(Top 61%)9813(Top 174%)
15K9.32 mi3.11 mi13527-4739785-1409785-14014550(Top 51%)10167(Top 63%)10167(Top 180%)
20K12.43 mi3.11 mi14023-4969968-1839968-18315390(Top 54%)10489(Top 65%)10489(Top 186%)
Half13.11 mi0.68 mi14126-10310007-3910007-3915927(Top 56%)10730(Top 67%)10730(Top 190%)
25K15.53 mi2.42 mi14002+1249915+929915+9213672(Top 48%)9591(Top 60%)9591(Top 170%)
30K18.64 mi3.11 mi13953+499837+789837+7814010(Top 49%)9600(Top 60%)9600(Top 170%)
20M20.00 mi1.36 mi13828+1259746+919746+9112919(Top 45%)8962(Top 56%)8962(Top 159%)
21M21.00 mi1.00 mi13719+1099666+809666+8012493(Top 44%)8611(Top 53%)8611(Top 153%)
35K21.75 mi0.75 mi13680+399632+349632+3412971(Top 46%)8795(Top 55%)8795(Top 156%)
23M23.00 mi1.25 mi13813-1339654-229654-2215616(Top 55%)9898(Top 61%)9898(Top 175%)
24M24.00 mi1.00 mi13970-1579684-309684-3016562(Top 58%)10277(Top 64%)10277(Top 182%)
40K24.85 mi0.85 mi14075-1059717-339717-3316540(Top 58%)10161(Top 63%)10161(Top 180%)
25.2M25.20 mi0.35 mi14135-609732-159732-1517615(Top 62%)10638(Top 66%)10638(Top 189%)
Finish26.22 mi1.02 mi14299-1649779-479779-4718740(Top 66%)11230(Top 70%)11230(Top 199%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

14550

Males

10167

M18-39

10167

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13536

Males

9813

M18-39

9813

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

14550

Males

10167

M18-39

10167

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15390

Males

10489

M18-39

10489

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15927

Males

10730

M18-39

10730

Half→25K

13.1 - 15.5 mi

Top 48%
×4story building
+66ft-88ft

Overall

13672

Males

9591

M18-39

9591

25K→30K

15.5 - 18.6 mi

Top 49%
×9story building
+181ft-148ft

Overall

14010

Males

9600

M18-39

9600

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12919

Males

8962

M18-39

8962

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

12493

Males

8611

M18-39

8611

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12971

Males

8795

M18-39

8795

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

15616

Males

9898

M18-39

9898

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

16562

Males

10277

M18-39

10277

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16540

Males

10161

M18-39

10161

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17615

Males

10638

M18-39

10638

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

18740

Males

11230

M18-39

11230

Passing Analysis

Category:
Athletes Passed
1445
Passed By
3129
Net Change
-1684
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12615
5K → 10K125564-439#12615#13054
10K → 15K89562-473#13054#13527
15K → 20K91587-496#13527#14023
20K → Half9112-103#14023#14126
Half → 25K21995+124#14126#14002
25K → 30K272223+49#14002#13953
30K → 20M18156+125#13953#13828
20M → 21M16253+109#13828#13719
21M → 35K7031+39#13719#13680
35K → 23M81214-133#13680#13813
23M → 24M48205-157#13813#13970
24M → 40K47152-105#13970#14075
40K → 25.2M1777-60#14075#14135
25.2M → Finish34198-164#14135#14299
TOTALS14453129-1684
📊

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