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BOSTON MARATHON 2025

Spencer Gray

Bib: 29241•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
8:56/mi
27:45
↑ 97↓ 3451.5%
10K· 6.21 mi
9:05/mi
55:58
↑ 79↓ 1380.4%
15K· 9.32 mi
9:19/mi
1:24:54
↑ 67↓ 78
20K· 12.43 mi
9:11/mi
1:53:25
↑ 106↓ 860.1%
Half· 13.11 mi
9:13/mi
1:59:42
↑ 19↓ 370.5%
25K· 15.53 mi
9:17/mi
2:22:13
↑ 66↓ 880.2%
30K· 18.64 mi
9:54/mi
2:53:00
↑ 181↓ 1480.2%
20M
10:00/mi
3:06:36
↑ 64↓ 500.2%
21M
10:03/mi
3:16:39
↑ 106↓ 241.6%
35K· 21.75 mi
9:21/mi
3:23:39
↑ 17↓ 861.7%
23M
9:26/mi
3:35:28
↑ 23↓ 630.6%
24M
9:30/mi
3:44:58
↓ 821.3%
40K· 24.85 mi
9:54/mi
3:53:26
↓ 200.3%
25.2M
10:29/mi
3:57:03
↑ 13↓ 160.2%
Finish· 26.22 mi
9:00/mi
4:06:13
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:42
Pace9:08 /mi
2nd Half
Distance13.11 mi
Time2:06:31
Pace9:39 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1527:458:5627:45
8:56
-
10K
6.21 mi12:14:2855:589:0028:13
9:05
+0:09
15K
9.32 mi12:43:241:24:549:0728:56
9:19
+0:14
20K
12.43 mi13:11:551:53:259:0828:31
9:11
-0:08
Half
13.11 mi13:18:121:59:429:086:17
9:13
+0:02
25K
15.53 mi13:40:432:22:139:0922:31
9:17
+0:04
30K
18.64 mi14:11:302:53:009:1730:47
9:54
+0:37
20M
20.00 mi14:25:063:06:369:2013:36
10:00
+0:06
21M
21.00 mi14:35:093:16:399:2210:03
10:03
+0:03
35K
21.75 mi14:42:093:23:399:227:00
9:21
-0:42
23M
23.00 mi14:53:583:35:289:2211:49
9:26
+0:05
24M
24.00 mi15:03:283:44:589:229:30
9:30
+0:04
40K
24.85 mi15:11:563:53:269:248:28
9:54
+0:24
25.2M
25.20 mi15:15:333:57:039:243:37
10:29
+0:35
Finish
26.22 mi15:24:434:06:139:249:10
9:00
-1:29

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

8:56 /mi

Average Pace

9:24 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:59:42

73% of race

Time at Steady Pace

1:06:31

27% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:23 /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 mi11:46:1527:458:5627:45
8:56
#22135
10K
6.21 mi12:14:2855:589:0028:13
9:05
#22456
15K
9.32 mi12:43:241:24:549:0728:56
9:19
#22732
20K
12.43 mi13:11:551:53:259:0828:31
9:11
#22476
Half
13.11 mi13:18:121:59:429:086:17
9:13
#22482
25K
15.53 mi13:40:432:22:139:0922:31
9:17
#22261
30K
18.64 mi14:11:302:53:009:1730:47
9:54
#22094
20M
20.00 mi14:25:063:06:369:2013:36
10:00
#21993
21M
21.00 mi14:35:093:16:399:2210:03
10:03
#21769
35K
21.75 mi14:42:093:23:399:227:00
9:21
#21697
23M
23.00 mi14:53:583:35:289:2211:49
9:26
#21499
24M
24.00 mi15:03:283:44:589:229:30
9:30
#21403
40K
24.85 mi15:11:563:53:269:248:28
9:54
#21350
25.2M
25.20 mi15:15:333:57:039:243:37
10:29
#21309
Finish
26.22 mi15:24:434:06:139:249:10
9:00
#21217
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22135133721337223244(Top 82%)13949(Top 87%)13949(Top 247%)
10K6.21 mi3.10 mi22456-32113526-15413526-15422736(Top 80%)13681(Top 85%)13681(Top 242%)
15K9.32 mi3.11 mi22732-27613695-16913695-16923244(Top 82%)13949(Top 87%)13949(Top 247%)
20K12.43 mi3.11 mi22476+25613565+13013565+13021803(Top 77%)13264(Top 82%)13264(Top 235%)
Half13.11 mi0.68 mi22482-6135651356522590(Top 80%)13593(Top 84%)13593(Top 241%)
25K15.53 mi2.42 mi22261+22113457+10813457+10821120(Top 74%)12906(Top 80%)12906(Top 229%)
30K18.64 mi3.11 mi22094+16713361+9613361+9621322(Top 75%)12856(Top 80%)12856(Top 228%)
20M20.00 mi1.36 mi21993+10113301+6013301+6020958(Top 74%)12569(Top 78%)12569(Top 223%)
21M21.00 mi1.00 mi21769+22413173+12813173+12818488(Top 65%)11392(Top 71%)11392(Top 202%)
35K21.75 mi0.75 mi21697+7213132+4113132+4119789(Top 70%)11873(Top 74%)11873(Top 210%)
23M23.00 mi1.25 mi21499+19813010+12213010+12218407(Top 65%)11177(Top 69%)11177(Top 198%)
24M24.00 mi1.00 mi21403+9612953+5712953+5719630(Top 69%)11690(Top 73%)11690(Top 207%)
40K24.85 mi0.85 mi21350+5312904+4912904+4920127(Top 71%)11854(Top 74%)11854(Top 210%)
25.2M25.20 mi0.35 mi21309+4112875+2912875+2918946(Top 67%)11301(Top 70%)11301(Top 200%)
Finish26.22 mi1.02 mi21217+9212818+5712818+5719010(Top 67%)11364(Top 71%)11364(Top 201%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

23244

Males

13949

M18-39

13949

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

22736

Males

13681

M18-39

13681

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

23244

Males

13949

M18-39

13949

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

21803

Males

13264

M18-39

13264

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

22590

Males

13593

M18-39

13593

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

21120

Males

12906

M18-39

12906

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21322

Males

12856

M18-39

12856

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

20958

Males

12569

M18-39

12569

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

18488

Males

11392

M18-39

11392

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

19789

Males

11873

M18-39

11873

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18407

Males

11177

M18-39

11177

23M→24M

23.0 - 24.0 mi

Top 69%
×6story building
+12ft-82ft

Overall

19630

Males

11690

M18-39

11690

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20127

Males

11854

M18-39

11854

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

18946

Males

11301

M18-39

11301

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

19010

Males

11364

M18-39

11364

Passing Analysis

Category:
Athletes Passed
2096
Passed By
1178
Net Change
+918
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22135
5K → 10K130451-321#22135#22456
10K → 15K94370-276#22456#22732
15K → 20K30751+256#22732#22476
20K → Half3440-6#22476#22482
Half → 25K26443+221#22482#22261
25K → 30K270103+167#22261#22094
30K → 20M14140+101#22094#21993
20M → 21M2273+224#21993#21769
21M → 35K819+72#21769#21697
35K → 23M21012+198#21697#21499
23M → 24M10812+96#21499#21403
24M → 40K7926+53#21403#21350
40K → 25.2M487+41#21350#21309
25.2M → Finish10311+92#21309#21217
TOTALS20961178+918
📊

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