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BOSTON MARATHON 2025

Bob Grebenc

Bib: 26758•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
8:15/mi
25:37
↑ 97↓ 3451.5%
10K· 6.21 mi
8:11/mi
51:03
↑ 79↓ 1380.4%
15K· 9.32 mi
8:00/mi
1:15:55
↑ 67↓ 78
20K· 12.43 mi
8:08/mi
1:41:10
↑ 106↓ 860.1%
Half· 13.11 mi
8:18/mi
1:46:50
↑ 19↓ 370.5%
25K· 15.53 mi
8:26/mi
2:07:17
↑ 66↓ 880.2%
30K· 18.64 mi
9:00/mi
2:35:14
↑ 181↓ 1480.2%
20M
9:14/mi
2:47:47
↑ 64↓ 500.2%
21M
9:52/mi
2:57:39
↑ 106↓ 241.6%
35K· 21.75 mi
9:56/mi
3:05:05
↑ 17↓ 861.7%
23M
10:17/mi
3:17:58
↑ 23↓ 630.6%
24M
10:08/mi
3:28:06
↓ 821.3%
40K· 24.85 mi
10:29/mi
3:37:04
↓ 200.3%
25.2M
11:56/mi
3:41:11
↑ 13↓ 160.2%
Finish· 26.22 mi
9:58/mi
3:51:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:50
Pace8:09 /mi
2nd Half
Distance13.11 mi
Time2:04:30
Pace9:30 /mi
📊Positive Split: 16.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:1225:378:1525:37
8:15
-
10K
6.21 mi12:09:3851:038:1325:26
8:11
-0:04
15K
9.32 mi12:34:301:15:558:0924:52
8:00
-0:11
20K
12.43 mi12:59:451:41:108:0825:15
8:08
+0:08
Half
13.11 mi13:05:251:46:508:095:40
8:18
+0:10
25K
15.53 mi13:25:522:07:178:1220:27
8:26
+0:08
30K
18.64 mi13:53:492:35:148:2027:57
9:00
+0:34
20M
20.00 mi14:06:222:47:478:2312:33
9:14
+0:14
21M
21.00 mi14:16:142:57:398:289:52
9:52
+0:38
35K
21.75 mi14:23:403:05:058:317:26
9:56
+0:04
23M
23.00 mi14:36:333:17:588:3612:53
10:17
+0:21
24M
24.00 mi14:46:413:28:068:4010:08
10:08
-0:09
40K
24.85 mi14:55:393:37:048:448:58
10:29
+0:21
25.2M
25.20 mi14:59:463:41:118:474:07
11:56
+1:27
Finish
26.22 mi15:09:553:51:208:5010:09
9:58
-1:58

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

8:00 /mi

Average Pace

8:50 /mi

Slowest Pace

11:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:17

55% of race

Time at Steady Pace

40:30

18% of race

Time at Slower Pace

1:03:33

27% of race

Average Pace: 8:49 /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 mi11:44:1225:378:1525:37
8:15
#18383
10K
6.21 mi12:09:3851:038:1325:26
8:11
#18077
15K
9.32 mi12:34:301:15:558:0924:52
8:00
#17395
20K
12.43 mi12:59:451:41:108:0825:15
8:08
#16971
Half
13.11 mi13:05:251:46:508:095:40
8:18
#17014
25K
15.53 mi13:25:522:07:178:1220:27
8:26
#16915
30K
18.64 mi13:53:492:35:148:2027:57
9:00
#17001
20M
20.00 mi14:06:222:47:478:2312:33
9:14
#17067
21M
21.00 mi14:16:142:57:398:289:52
9:52
#17088
35K
21.75 mi14:23:403:05:058:317:26
9:56
#17336
23M
23.00 mi14:36:333:17:588:3612:53
10:17
#17713
24M
24.00 mi14:46:413:28:068:4010:08
10:08
#17968
40K
24.85 mi14:55:393:37:048:448:58
10:29
#18208
25.2M
25.20 mi14:59:463:41:118:474:07
11:56
#18360
Finish
26.22 mi15:09:553:51:208:5010:09
9:58
#18607
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi18383117571175716070(Top 57%)10843(Top 67%)10843(Top 192%)
10K6.21 mi3.10 mi18077+30611649+10811649+10817781(Top 63%)11563(Top 72%)11563(Top 205%)
15K9.32 mi3.11 mi17395+68211395+25411395+25416070(Top 57%)10843(Top 67%)10843(Top 192%)
20K12.43 mi3.11 mi16971+42411200+19511200+19515832(Top 56%)10676(Top 66%)10676(Top 189%)
Half13.11 mi0.68 mi17014-4311206-611206-617942(Top 63%)11612(Top 72%)11612(Top 206%)
25K15.53 mi2.42 mi16915+9911151+5511151+5516779(Top 59%)11007(Top 68%)11007(Top 195%)
30K18.64 mi3.11 mi17001-8611134+1711134+1717670(Top 62%)11222(Top 70%)11222(Top 199%)
20M20.00 mi1.36 mi17067-6611130+411130+417942(Top 63%)11214(Top 70%)11214(Top 199%)
21M21.00 mi1.00 mi17088-2111108+2211108+2217760(Top 63%)11046(Top 69%)11046(Top 196%)
35K21.75 mi0.75 mi17336-24811185-7711185-7721699(Top 76%)12763(Top 79%)12763(Top 226%)
23M23.00 mi1.25 mi17713-37711327-14211327-14221375(Top 75%)12583(Top 78%)12583(Top 223%)
24M24.00 mi1.00 mi17968-25511412-8511412-8521729(Top 76%)12685(Top 79%)12685(Top 225%)
40K24.85 mi0.85 mi18208-24011500-8811500-8821871(Top 77%)12678(Top 79%)12678(Top 225%)
25.2M25.20 mi0.35 mi18360-15211553-5311553-5323067(Top 81%)13310(Top 83%)13310(Top 236%)
Finish26.22 mi1.02 mi18607-24711651-9811651-9822794(Top 80%)13167(Top 82%)13167(Top 233%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

16070

Males

10843

M18-39

10843

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

17781

Males

11563

M18-39

11563

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

16070

Males

10843

M18-39

10843

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

15832

Males

10676

M18-39

10676

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

17942

Males

11612

M18-39

11612

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

16779

Males

11007

M18-39

11007

25K→30K

15.5 - 18.6 mi

Top 62%
×9story building
+181ft-148ft

Overall

17670

Males

11222

M18-39

11222

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

17942

Males

11214

M18-39

11214

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

17760

Males

11046

M18-39

11046

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

21699

Males

12763

M18-39

12763

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

21375

Males

12583

M18-39

12583

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

21729

Males

12685

M18-39

12685

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21871

Males

12678

M18-39

12678

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

23067

Males

13310

M18-39

13310

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2story building
+22ft-21ft

Overall

22794

Males

13167

M18-39

13167

Passing Analysis

Category:
Athletes Passed
2316
Passed By
2540
Net Change
-224
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18383
5K → 10K446140+306#18383#18077
10K → 15K70018+682#18077#17395
15K → 20K44521+424#17395#16971
20K → Half2366-43#16971#17014
Half → 25K19091+99#17014#16915
25K → 30K192278-86#16915#17001
30K → 20M72138-66#17001#17067
20M → 21M114135-21#17067#17088
21M → 35K24272-248#17088#17336
35K → 23M38415-377#17336#17713
23M → 24M32287-255#17713#17968
24M → 40K22262-240#17968#18208
40K → 25.2M3155-152#18208#18360
25.2M → Finish15262-247#18360#18607
TOTALS23162540-224
📊

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