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BOSTON MARATHON 2025

Grant Glazer

Bib: 4921•M

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 48%
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
7:53/mi
24:29
↑ 97↓ 3451.5%
10K· 6.21 mi
8:05/mi
49:36
↑ 79↓ 1380.4%
15K· 9.32 mi
8:07/mi
1:14:50
↑ 67↓ 78
20K· 12.43 mi
8:31/mi
1:41:17
↑ 106↓ 860.1%
Half· 13.11 mi
7:58/mi
1:46:43
↑ 19↓ 370.5%
25K· 15.53 mi
8:10/mi
2:06:32
↑ 66↓ 880.2%
30K· 18.64 mi
8:11/mi
2:31:58
↑ 181↓ 1480.2%
20M
8:09/mi
2:43:03
↑ 64↓ 500.2%
21M
8:28/mi
2:51:31
↑ 106↓ 241.6%
35K· 21.75 mi
8:07/mi
2:57:35
↑ 17↓ 861.7%
23M
8:06/mi
3:07:43
↑ 23↓ 630.6%
24M
7:33/mi
3:15:16
↓ 821.3%
40K· 24.85 mi
7:36/mi
3:21:46
↓ 200.3%
25.2M
8:19/mi
3:24:38
↑ 13↓ 160.2%
Finish· 26.22 mi
7:14/mi
3:32:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:46:43
Pace8:08 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:45:17
Pace8:02 /mi
📊Negative Split: 1.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:3224:297:5324:29
7:53
-
10K
6.21 mi11:22:3949:367:5925:07
8:05
+0:12
15K
9.32 mi11:47:531:14:508:0225:14
8:07
+0:02
20K
12.43 mi12:14:201:41:178:0926:27
8:31
+0:24
Half
13.11 mi12:19:461:46:438:085:26
7:58
-0:33
25K
15.53 mi12:39:352:06:328:0919:49
8:10
+0:12
30K
18.64 mi13:05:012:31:588:0925:26
8:11
+0:01
20M
20.00 mi13:16:062:43:038:0911:05
8:09
-0:02
21M
21.00 mi13:24:342:51:318:108:28
8:28
+0:19
35K
21.75 mi13:30:382:57:358:106:04
8:07
-0:21
23M
23.00 mi13:40:463:07:438:1010:08
8:06
-0:01
24M
24.00 mi13:48:193:15:168:087:33
7:33
-0:33
40K
24.85 mi13:54:493:21:468:076:30
7:36
+0:03
25.2M
25.20 mi13:57:413:24:388:072:52
8:19
+0:43
Finish
26.22 mi14:05:033:32:008:057:22
7:14
-1:05

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

7:14 /mi

Average Pace

8:05 /mi

Slowest Pace

8:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

45:54

22% of race

Time at Steady Pace

2:46:06

78% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:05 /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 mi10:57:3224:297:5324:29
7:53
#15504
10K
6.21 mi11:22:3949:367:5925:07
8:05
#16353
15K
9.32 mi11:47:531:14:508:0225:14
8:07
#16539
20K
12.43 mi12:14:201:41:178:0926:27
8:31
#17032
Half
13.11 mi12:19:461:46:438:085:26
7:58
#16956
25K
15.53 mi12:39:352:06:328:0919:49
8:10
#16601
30K
18.64 mi13:05:012:31:588:0925:26
8:11
#15882
20M
20.00 mi13:16:062:43:038:0911:05
8:09
#15494
21M
21.00 mi13:24:342:51:318:108:28
8:28
#15153
35K
21.75 mi13:30:382:57:358:106:04
8:07
#15056
23M
23.00 mi13:40:463:07:438:1010:08
8:06
#14746
24M
24.00 mi13:48:193:15:168:087:33
7:33
#14447
40K
24.85 mi13:54:493:21:468:076:30
7:36
#14175
25.2M
25.20 mi13:57:413:24:388:072:52
8:19
#14053
Finish
26.22 mi14:05:033:32:008:057:22
7:14
#13748
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi15504106241062416877(Top 59%)11166(Top 69%)11166(Top 198%)
10K6.21 mi3.10 mi16353-84910955-33110955-33117074(Top 60%)11273(Top 70%)11273(Top 200%)
15K9.32 mi3.11 mi16539-18611037-8211037-8216877(Top 59%)11166(Top 69%)11166(Top 198%)
20K12.43 mi3.11 mi17032-49311221-18411221-18418331(Top 65%)11756(Top 73%)11756(Top 208%)
Half13.11 mi0.68 mi16956+7611188+3311188+3315546(Top 55%)10574(Top 66%)10574(Top 187%)
25K15.53 mi2.42 mi16601+35511027+16111027+16115110(Top 53%)10273(Top 64%)10273(Top 182%)
30K18.64 mi3.11 mi15882+71910679+34810679+34812720(Top 45%)9016(Top 56%)9016(Top 160%)
20M20.00 mi1.36 mi15494+38810480+19910480+19911509(Top 41%)8298(Top 52%)8298(Top 147%)
21M21.00 mi1.00 mi15153+34110298+18210298+18210244(Top 36%)7494(Top 47%)7494(Top 133%)
35K21.75 mi0.75 mi15056+9710241+5710241+5712967(Top 46%)8791(Top 55%)8791(Top 156%)
23M23.00 mi1.25 mi14746+31010077+16410077+16410704(Top 38%)7599(Top 47%)7599(Top 135%)
24M24.00 mi1.00 mi14447+2999922+1559922+1558061(Top 28%)6156(Top 38%)6156(Top 109%)
40K24.85 mi0.85 mi14175+2729757+1659757+1657440(Top 26%)5698(Top 35%)5698(Top 101%)
25.2M25.20 mi0.35 mi14053+1229695+629695+627723(Top 27%)5782(Top 36%)5782(Top 102%)
Finish26.22 mi1.02 mi13748+3059524+1719524+1717232(Top 25%)5479(Top 34%)5479(Top 97%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

16877

Males

11166

M18-39

11166

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

17074

Males

11273

M18-39

11273

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

16877

Males

11166

M18-39

11166

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

18331

Males

11756

M18-39

11756

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

15546

Males

10574

M18-39

10574

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

15110

Males

10273

M18-39

10273

25K→30K

15.5 - 18.6 mi

Top 45%
×9story building
+181ft-148ft

Overall

12720

Males

9016

M18-39

9016

30K→20M

18.6 - 20.0 mi

Top 41%
×5story building
+64ft-50ft

Overall

11509

Males

8298

M18-39

8298

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

10244

Males

7494

M18-39

7494

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12967

Males

8791

M18-39

8791

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10704

Males

7599

M18-39

7599

23M→24M

23.0 - 24.0 mi

Top 28%
×6story building
+12ft-82ft

Overall

8061

Males

6156

M18-39

6156

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

7440

Males

5698

M18-39

5698

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7723

Males

5782

M18-39

5782

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2story building
+22ft-21ft

Overall

7232

Males

5479

M18-39

5479

Passing Analysis

Category:
Athletes Passed
3659
Passed By
1903
Net Change
+1756
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15504
5K → 10K89938-849#15504#16353
10K → 15K154340-186#16353#16539
15K → 20K76569-493#16539#17032
20K → Half837+76#17032#16956
Half → 25K36914+355#16956#16601
25K → 30K7234+719#16601#15882
30K → 20M3924+388#15882#15494
20M → 21M3432+341#15494#15153
21M → 35K11013+97#15153#15056
35K → 23M32010+310#15056#14746
23M → 24M2990+299#14746#14447
24M → 40K2720+272#14447#14175
40K → 25.2M1231+122#14175#14053
25.2M → Finish3061+305#14053#13748
TOTALS36591903+1756
📊

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