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BOSTON MARATHON 2025

Jonathan Leff

CO

Bib: 9621 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 38%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 40%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:09/mi
22:13
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:13/mi
44:38
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:14/mi
1:07:05
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:33/mi
1:30:32
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:20/mi
1:35:32
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:39/mi
1:54:05
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:06/mi
2:19:15
↑ 181↓ 1480.2%
138 ft elev
20M
8:07/mi
2:30:17
↑ 64↓ 500.2%
148 ft elev
21M
9:03/mi
2:39:20
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:12/mi
2:45:28
↑ 17↓ 861.7%
156 ft elev
23M
8:14/mi
2:55:47
↑ 23↓ 630.6%
116 ft elev
24M
8:15/mi
3:04:02
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:28/mi
3:11:16
↓ 200.3%
20 ft elev
25.2M
9:20/mi
3:14:29
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:56/mi
3:22:34
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:35:327:17 /mi⚡ faster
2nd Half
1:47:028:10 /mi+12.0%
Positive split — 12.0% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:3222:137:0922:13
7:09
-
10K
6.21 mi11:10:5744:387:1122:25
7:13
+0:04
15K
9.32 mi11:33:241:07:057:1222:27
7:14
+0:01
20K
12.43 mi11:56:511:30:327:1723:27
7:33
+0:19
Half
13.11 mi12:01:511:35:327:175:00
7:20
-0:13
25K
15.53 mi12:20:241:54:057:2118:33
7:39
+0:19
30K
18.64 mi12:45:342:19:157:2825:10
8:06
+0:27
20M
20.00 mi12:56:362:30:177:3111:02
8:07
+0:01
21M
21.00 mi13:05:392:39:207:359:03
9:03
+0:56
35K
21.75 mi13:11:472:45:287:376:08
8:12
-0:51
23M
23.00 mi13:22:062:55:477:3910:19
8:14
+0:02
24M
24.00 mi13:30:213:04:027:408:15
8:15
+0:01
40K
24.85 mi13:37:353:11:167:427:14
8:28
+0:13
25.2M
25.20 mi13:40:483:14:297:433:13
9:20
+0:52
Finish
26.22 mi13:48:533:22:347:448:05
7:56
-1:24

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

7:09 /mi

Average Pace

7:44 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

1:54:05

56% of race

Time at Steady Pace

1:08:59

34% of race

Time at Slower Pace

19:30

10% of race

Average Pace: 7:44 /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 mi10:48:3222:137:0922:13
7:09
#9070
10K
6.21 mi11:10:5744:387:1122:25
7:13
#9305
15K
9.32 mi11:33:241:07:057:1222:27
7:14
#9317
20K
12.43 mi11:56:511:30:327:1723:27
7:33
#9736
Half
13.11 mi12:01:511:35:327:175:00
7:20
#9755
25K
15.53 mi12:20:241:54:057:2118:33
7:39
#9944
30K
18.64 mi12:45:342:19:157:2825:10
8:06
#10310
20M
20.00 mi12:56:362:30:177:3111:02
8:07
#10369
21M
21.00 mi13:05:392:39:207:359:03
9:03
#10582
35K
21.75 mi13:11:472:45:287:376:08
8:12
#10673
23M
23.00 mi13:22:062:55:477:3910:19
8:14
#10681
24M
24.00 mi13:30:213:04:027:408:15
8:15
#10757
40K
24.85 mi13:37:353:11:167:427:14
8:28
#10831
25.2M
25.20 mi13:40:483:14:297:433:13
9:20
#10874
Finish
26.22 mi13:48:533:22:347:448:05
7:56
#10902
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi907076557655933577337733
10K6.21 mi3.10 mi9305-2357778-1237778-123961879437943
15K9.32 mi3.11 mi9317-127767+117767+11933577337733
20K12.43 mi3.11 mi9736-4197961-1947961-1941113585588558
Half13.11 mi0.68 mi9755-197972-117972-111023081468146
25K15.53 mi2.42 mi9944-1898042-708042-701114484578457
30K18.64 mi3.11 mi10310-3668175-1338175-1331208887238723
20M20.00 mi1.36 mi10369-598157+188157+181122481438143
21M21.00 mi1.00 mi10582-2138220-638220-631376692189218
35K21.75 mi0.75 mi10673-918250-308250-301355790509050
23M23.00 mi1.25 mi10681-88204+468204+461161180398039
24M24.00 mi1.00 mi10757-76820482041288485888588
40K24.85 mi0.85 mi10831-748199+58199+51315185908590
25.2M25.20 mi0.35 mi10874-438205-68205-61352886988698
Finish26.22 mi1.02 mi10902-288183+228183+221239182248224

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

9335

Males

7733

M40-44

7733

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9618

Males

7943

M40-44

7943

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

9335

Males

7733

M40-44

7733

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

11135

Males

8558

M40-44

8558

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

10230

Males

8146

M40-44

8146

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

11144

Males

8457

M40-44

8457

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

12088

Males

8723

M40-44

8723

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

11224

Males

8143

M40-44

8143

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

13766

Males

9218

M40-44

9218

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

13557

Males

9050

M40-44

9050

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11611

Males

8039

M40-44

8039

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12884

Males

8588

M40-44

8588

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13151

Males

8590

M40-44

8590

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13528

Males

8698

M40-44

8698

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2story building
+22ft-21ft

Overall

12391

Males

8224

M40-44

8224

Passing Analysis

Category:
Athletes Passed
1129
Passed By
2959
Net Change
-1832
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9070
5K → 10K142377-235#9070#9305
10K → 15K154166-12#9305#9317
15K → 20K91510-419#9317#9736
20K → Half2847-19#9736#9755
Half → 25K99288-189#9755#9944
25K → 30K139503-366#9944#10310
30K → 20M98157-59#10310#10369
20M → 21M54267-213#10369#10582
21M → 35K31122-91#10582#10673
35K → 23M113121-8#10673#10681
23M → 24M51127-76#10681#10757
24M → 40K49123-74#10757#10831
40K → 25.2M2265-43#10831#10874
25.2M → Finish5886-28#10874#10902
TOTALS11292959-1832

Passing Charts

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