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BOSTON MARATHON 2025

Jerome Balcer

Bib: 21365•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Top 21%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:17
Rank: #17627
Start → 5K
25:17 | 8:08/mi
10K· 6.21 mi
50:36
Rank: #17588 (+39)
5K → 10K
25:19 | 8:09/mi
15K· 9.32 mi
1:15:52
Rank: #17351 (+237)
10K → 15K
25:16 | 8:08/mi
20K· 12.43 mi
1:41:30
Rank: #17133 (+218)
15K → 20K
25:38 | 8:15/mi
Half· 13.11 mi
1:47:03
Rank: #17103 (+30)
20K → Half
5:33 | 8:08/mi
25K· 15.53 mi
2:07:24
Rank: #16963 (+140)
Half → 25K
20:21 | 8:24/mi
30K· 18.64 mi
2:35:30
Rank: #17095 (-132)
25K → 30K
28:06 | 9:03/mi
20M
2:48:01
Rank: #17137 (-42)
30K → 20M
12:31 | 9:13/mi
21M
2:58:11
Rank: #17262 (-125)
20M → 21M
10:10 | 10:10/mi
35K· 21.75 mi
3:04:56
Rank: #17298 (-36)
21M → 35K
6:45 | 9:01/mi
23M
3:16:41
Rank: #17352 (-54)
35K → 23M
11:45 | 9:23/mi
24M
3:25:52
Rank: #17394 (-42)
23M → 24M
9:11 | 9:11/mi
40K· 24.85 mi
3:33:55
Rank: #17449 (-55)
24M → 40K
8:03 | 9:25/mi
25.2M
3:37:35
Rank: #17486 (-37)
40K → 25.2M
3:40 | 10:38/mi
Finish· 26.22 mi
3:46:40
Rank: #17526 (-40)
25.2M → Finish
9:05 | 8:55/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:03
Pace8:10 /mi
2nd Half
Distance13.11 mi
Time1:59:37
Pace9:07 /mi
📊Positive Split: 11.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0225:178:0825:17
8:08
-
10K
6.21 mi11:44:2150:368:0925:19
8:09
+0:01
15K
9.32 mi12:09:371:15:528:0825:16
8:08
-0:01
20K
12.43 mi12:35:151:41:308:1025:38
8:15
+0:07
Half
13.11 mi12:40:481:47:038:105:33
8:08
-0:07
25K
15.53 mi13:01:092:07:248:1220:21
8:24
+0:16
30K
18.64 mi13:29:152:35:308:2128:06
9:03
+0:39
20M
20.00 mi13:41:462:48:018:2412:31
9:13
+0:10
21M
21.00 mi13:51:562:58:118:2910:10
10:10
+0:57
35K
21.75 mi13:58:413:04:568:306:45
9:01
-1:09
23M
23.00 mi14:10:263:16:418:3311:45
9:23
+0:22
24M
24.00 mi14:19:373:25:528:359:11
9:11
-0:12
40K
24.85 mi14:27:403:33:558:368:03
9:25
+0:14
25.2M
25.20 mi14:31:203:37:358:383:40
10:38
+1:13
Finish
26.22 mi14:40:253:46:408:399:05
8:55
-1:43

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

8:08 /mi

Average Pace

8:39 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:24

56% of race

Time at Steady Pace

1:17:23

34% of race

Time at Slower Pace

21:53

10% of race

Average Pace: 8:39 /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 mi11:19:0225:178:0825:17
8:08
#17627
10K
6.21 mi11:44:2150:368:0925:19
8:09
#17588
15K
9.32 mi12:09:371:15:528:0825:16
8:08
#17351
20K
12.43 mi12:35:151:41:308:1025:38
8:15
#17133
Half
13.11 mi12:40:481:47:038:105:33
8:08
#17103
25K
15.53 mi13:01:092:07:248:1220:21
8:24
#16963
30K
18.64 mi13:29:152:35:308:2128:06
9:03
#17095
20M
20.00 mi13:41:462:48:018:2412:31
9:13
#17137
21M
21.00 mi13:51:562:58:118:2910:10
10:10
#17262
35K
21.75 mi13:58:413:04:568:306:45
9:01
#17298
23M
23.00 mi14:10:263:16:418:3311:45
9:23
#17352
24M
24.00 mi14:19:373:25:528:359:11
9:11
#17394
40K
24.85 mi14:27:403:33:558:368:03
9:25
#17449
25.2M
25.20 mi14:31:203:37:358:383:40
10:38
#17486
Finish
26.22 mi14:40:253:46:408:399:05
8:55
#17526
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi17627114641146416954(Top 60%)11198(Top 70%)11198(Top 1752%)
10K6.21 mi3.10 mi17588+3911445+1911445+1917526(Top 62%)11463(Top 71%)11463(Top 1794%)
15K9.32 mi3.11 mi17351+23711377+6811377+6816954(Top 60%)11198(Top 70%)11198(Top 1752%)
20K12.43 mi3.11 mi17133+21811262+11511262+11516622(Top 59%)11016(Top 68%)11016(Top 1724%)
Half13.11 mi0.68 mi17103+3011241+2111241+2116820(Top 59%)11115(Top 69%)11115(Top 1739%)
25K15.53 mi2.42 mi16963+14011175+6611175+6616524(Top 58%)10887(Top 68%)10887(Top 1704%)
30K18.64 mi3.11 mi17095-13211170+511170+517899(Top 63%)11321(Top 70%)11321(Top 1772%)
20M20.00 mi1.36 mi17137-4211161+911161+917813(Top 63%)11163(Top 69%)11163(Top 1747%)
21M21.00 mi1.00 mi17262-12511185-2411185-2418903(Top 67%)11563(Top 72%)11563(Top 1810%)
35K21.75 mi0.75 mi17298-3611170+1511170+1518312(Top 64%)11182(Top 69%)11182(Top 1750%)
23M23.00 mi1.25 mi17352-5411162+811162+818148(Top 64%)11043(Top 69%)11043(Top 1728%)
24M24.00 mi1.00 mi17394-4211159+311159+318255(Top 64%)11037(Top 69%)11037(Top 1727%)
40K24.85 mi0.85 mi17449-5511153+611153+618333(Top 65%)10993(Top 68%)10993(Top 1720%)
25.2M25.20 mi0.35 mi17486-3711156-311156-319433(Top 68%)11507(Top 71%)11507(Top 1801%)
Finish26.22 mi1.02 mi17526-4011151+511151+518573(Top 65%)11153(Top 69%)11153(Top 1745%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21stories
+97ft-345ft

Overall

16954

Males

11198

M65-69

11198

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

17526

Males

11463

M65-69

11463

10K→15K

6.2 - 9.3 mi

Top 60%
×3stories
+67ft-78ft

Overall

16954

Males

11198

M65-69

11198

15K→20K

9.3 - 12.4 mi

Top 59%
×5stories
+106ft-86ft

Overall

16622

Males

11016

M65-69

11016

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

16820

Males

11115

M65-69

11115

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

16524

Males

10887

M65-69

10887

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

17899

Males

11321

M65-69

11321

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

17813

Males

11163

M65-69

11163

20M→21M

20.0 - 21.0 mi

Top 67%
×8stories
+106ft-24ft

Overall

18903

Males

11563

M65-69

11563

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

18312

Males

11182

M65-69

11182

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

18148

Males

11043

M65-69

11043

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

18255

Males

11037

M65-69

11037

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18333

Males

10993

M65-69

10993

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

19433

Males

11507

M65-69

11507

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2stories
+22ft-21ft

Overall

18573

Males

11153

M65-69

11153

Passing Analysis

Category:
Athletes Passed
1889
Passed By
1788
Net Change
+101
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17627
5K → 10K310271+39#17627#17588
10K → 15K338101+237#17588#17351
15K → 20K29274+218#17351#17133
20K → Half4414+30#17133#17103
Half → 25K21979+140#17103#16963
25K → 30K185317-132#16963#17095
30K → 20M81123-42#17095#17137
20M → 21M75200-125#17137#17262
21M → 35K6197-36#17262#17298
35K → 23M99153-54#17298#17352
23M → 24M72114-42#17352#17394
24M → 40K50105-55#17394#17449
40K → 25.2M1552-37#17449#17486
25.2M → Finish4888-40#17486#17526
TOTALS18891788+101
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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