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BOSTON MARATHON 2025

Ilya Bass

Bib: 13288•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:15
Rank: #14860
Start → 5K
24:15 | 7:48/mi
10K· 6.21 mi
49:02
Rank: #15591 (-731)
5K → 10K
24:47 | 7:59/mi
15K· 9.32 mi
1:13:36
Rank: #15459 (+132)
10K → 15K
24:34 | 7:54/mi
20K· 12.43 mi
1:38:56
Rank: #15642 (-183)
15K → 20K
25:20 | 8:09/mi
Half· 13.11 mi
1:44:24
Rank: #15653 (-11)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
2:04:25
Rank: #15616 (+37)
Half → 25K
20:01 | 8:15/mi
30K· 18.64 mi
2:32:19
Rank: #16015 (-399)
25K → 30K
27:54 | 8:59/mi
20M
2:46:02
Rank: #16520 (-505)
30K → 20M
13:43 | 10:06/mi
21M
2:58:33
Rank: #17374 (-854)
20M → 21M
12:31 | 12:31/mi
35K· 21.75 mi
3:05:31
Rank: #17475 (-101)
21M → 35K
6:58 | 9:19/mi
23M
3:18:07
Rank: #17745 (-270)
35K → 23M
12:36 | 10:04/mi
24M
3:27:36
Rank: #17843 (-98)
23M → 24M
9:29 | 9:29/mi
40K· 24.85 mi
3:35:23
Rank: #17791 (+52)
24M → 40K
7:47 | 9:06/mi
25.2M
3:38:44
Rank: #17752 (+39)
40K → 25.2M
3:21 | 9:43/mi
Finish· 26.22 mi
3:47:33
Rank: #17735 (+17)
25.2M → Finish
8:49 | 8:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:24
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time2:03:09
Pace9:24 /mi
📊Positive Split: 18.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:1124:157:4824:15
7:48
-
10K
6.21 mi11:41:5849:027:5324:47
7:59
+0:11
15K
9.32 mi12:06:321:13:367:5424:34
7:54
-0:05
20K
12.43 mi12:31:521:38:567:5825:20
8:09
+0:15
Half
13.11 mi12:37:201:44:247:585:28
8:01
-0:08
25K
15.53 mi12:57:212:04:258:0120:01
8:15
+0:14
30K
18.64 mi13:25:152:32:198:1027:54
8:59
+0:44
20M
20.00 mi13:38:582:46:028:1813:43
10:06
+1:07
21M
21.00 mi13:51:292:58:338:3012:31
12:31
+2:25
35K
21.75 mi13:58:273:05:318:326:58
9:19
-3:12
23M
23.00 mi14:11:033:18:078:3712:36
10:04
+0:45
24M
24.00 mi14:20:323:27:368:399:29
9:29
-0:35
40K
24.85 mi14:28:193:35:238:407:47
9:06
-0:23
25.2M
25.20 mi14:31:403:38:448:413:21
9:43
+0:37
Finish
26.22 mi14:40:293:47:338:418:49
8:39
-1:04

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

7:48 /mi

Average Pace

8:41 /mi

Slowest Pace

12:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:25

55% of race

Time at Steady Pace

1:00:57

27% of race

Time at Slower Pace

42:11

19% of race

Average Pace: 8:41 /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 mi11:17:1124:157:4824:15
7:48
#14860
10K
6.21 mi11:41:5849:027:5324:47
7:59
#15591
15K
9.32 mi12:06:321:13:367:5424:34
7:54
#15459
20K
12.43 mi12:31:521:38:567:5825:20
8:09
#15642
Half
13.11 mi12:37:201:44:247:585:28
8:01
#15653
25K
15.53 mi12:57:212:04:258:0120:01
8:15
#15616
30K
18.64 mi13:25:152:32:198:1027:54
8:59
#16015
20M
20.00 mi13:38:582:46:028:1813:43
10:06
#16520
21M
21.00 mi13:51:292:58:338:3012:31
12:31
#17374
35K
21.75 mi13:58:273:05:318:326:58
9:19
#17475
23M
23.00 mi14:11:033:18:078:3712:36
10:04
#17745
24M
24.00 mi14:20:323:27:368:399:29
9:29
#17843
40K
24.85 mi14:28:193:35:238:407:47
9:06
#17791
25.2M
25.20 mi14:31:403:38:448:413:21
9:43
#17752
Finish
26.22 mi14:40:293:47:338:418:49
8:39
#17735
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi14860103811038115290(Top 54%)10504(Top 65%)10504(Top 526%)
10K6.21 mi3.10 mi15591-73110655-27410655-27416286(Top 57%)10941(Top 68%)10941(Top 548%)
15K9.32 mi3.11 mi15459+13210595+6010595+6015290(Top 54%)10504(Top 65%)10504(Top 526%)
20K12.43 mi3.11 mi15642-18310643-4810643-4816011(Top 56%)10751(Top 67%)10751(Top 539%)
Half13.11 mi0.68 mi15653-11106431064315970(Top 56%)10773(Top 67%)10773(Top 540%)
25K15.53 mi2.42 mi15616+3710618+2510618+2515642(Top 55%)10508(Top 65%)10508(Top 526%)
30K18.64 mi3.11 mi16015-39910740-12210740-12217577(Top 62%)11180(Top 69%)11180(Top 560%)
20M20.00 mi1.36 mi16520-50510906-16610906-16621245(Top 75%)12692(Top 79%)12692(Top 636%)
21M21.00 mi1.00 mi17374-85411224-31811224-31824418(Top 86%)14107(Top 88%)14107(Top 707%)
35K21.75 mi0.75 mi17475-10111249-2511249-2519597(Top 69%)11774(Top 73%)11774(Top 590%)
23M23.00 mi1.25 mi17745-27011340-9111340-9120677(Top 73%)12230(Top 76%)12230(Top 613%)
24M24.00 mi1.00 mi17843-9811346-611346-619564(Top 69%)11649(Top 72%)11649(Top 584%)
40K24.85 mi0.85 mi17791+5211311+3511311+3516862(Top 59%)10308(Top 64%)10308(Top 516%)
25.2M25.20 mi0.35 mi17752+3911281+3011281+3015653(Top 55%)9719(Top 60%)9719(Top 487%)
Finish26.22 mi1.02 mi17735+1711258+2311258+2317172(Top 60%)10482(Top 65%)10482(Top 525%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

15290

Males

10504

M50-54

10504

5K→10K

3.1 - 6.2 mi

Top 57%
×5stories
+79ft-138ft

Overall

16286

Males

10941

M50-54

10941

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

15290

Males

10504

M50-54

10504

15K→20K

9.3 - 12.4 mi

Top 56%
×5stories
+106ft-86ft

Overall

16011

Males

10751

M50-54

10751

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

15970

Males

10773

M50-54

10773

Half→25K

13.1 - 15.5 mi

Top 55%
×4stories
+66ft-88ft

Overall

15642

Males

10508

M50-54

10508

25K→30K

15.5 - 18.6 mi

Top 62%
×9stories
+181ft-148ft

Overall

17577

Males

11180

M50-54

11180

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

21245

Males

12692

M50-54

12692

20M→21M

20.0 - 21.0 mi

Top 86%
×8stories
+106ft-24ft

Overall

24418

Males

14107

M50-54

14107

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

19597

Males

11774

M50-54

11774

35K→23M

21.8 - 23.0 mi

Top 73%
×5stories
+23ft-63ft

Overall

20677

Males

12230

M50-54

12230

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19564

Males

11649

M50-54

11649

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

16862

Males

10308

M50-54

10308

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15653

Males

9719

M50-54

9719

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2stories
+22ft-21ft

Overall

17172

Males

10482

M50-54

10482

Passing Analysis

Category:
Athletes Passed
1269
Passed By
4144
Net Change
-2875
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14860
5K → 10K97828-731#14860#15591
10K → 15K264132+132#15591#15459
15K → 20K157340-183#15459#15642
20K → Half2536-11#15642#15653
Half → 25K196159+37#15653#15616
25K → 30K122521-399#15616#16015
30K → 20M28533-505#16015#16520
20M → 21M13867-854#16520#17374
21M → 35K53154-101#17374#17475
35K → 23M46316-270#17475#17745
23M → 24M54152-98#17745#17843
24M → 40K8432+52#17843#17791
40K → 25.2M5617+39#17791#17752
25.2M → Finish7457+17#17752#17735
TOTALS12694144-2875
📊

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