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BOSTON MARATHON 2025

Daniel Simbro

Bib: 10914•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 44%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 47%
Division (M45-49)
#0 / 2386
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
7:32/mi
23:23
↑ 97↓ 3451.5%
10K· 6.21 mi
7:28/mi
46:34
↑ 79↓ 1380.4%
15K· 9.32 mi
7:29/mi
1:09:50
↑ 67↓ 78
20K· 12.43 mi
7:39/mi
1:33:37
↑ 106↓ 860.1%
Half· 13.11 mi
7:24/mi
1:38:40
↑ 19↓ 370.5%
25K· 15.53 mi
7:33/mi
1:56:59
↑ 66↓ 880.2%
30K· 18.64 mi
7:48/mi
2:21:14
↑ 181↓ 1480.2%
20M
7:47/mi
2:31:49
↑ 64↓ 500.2%
21M
8:30/mi
2:40:19
↑ 106↓ 241.6%
35K· 21.75 mi
9:17/mi
2:47:16
↑ 17↓ 861.7%
23M
9:25/mi
2:59:04
↑ 23↓ 630.6%
24M
8:14/mi
3:07:18
↓ 821.3%
40K· 24.85 mi
9:44/mi
3:15:37
↓ 200.3%
25.2M
8:36/mi
3:18:35
↑ 13↓ 160.2%
Finish· 26.22 mi
8:50/mi
3:27:35
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:40
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:48:55
Pace8:19 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5623:237:3223:23
7:32
-
10K
6.21 mi11:13:0746:347:3023:11
7:28
-0:04
15K
9.32 mi11:36:231:09:507:3023:16
7:29
+0:01
20K
12.43 mi12:00:101:33:377:3223:47
7:39
+0:10
Half
13.11 mi12:05:131:38:407:325:03
7:24
-0:15
25K
15.53 mi12:23:321:56:597:3218:19
7:33
+0:09
30K
18.64 mi12:47:472:21:147:3524:15
7:48
+0:15
20M
20.00 mi12:58:222:31:497:3510:35
7:47
-0:01
21M
21.00 mi13:06:522:40:197:388:30
8:30
+0:43
35K
21.75 mi13:13:492:47:167:416:57
9:17
+0:47
23M
23.00 mi13:25:372:59:047:4711:48
9:25
+0:08
24M
24.00 mi13:33:513:07:187:488:14
8:14
-1:11
40K
24.85 mi13:42:103:15:377:528:19
9:44
+1:30
25.2M
25.20 mi13:45:083:18:357:532:58
8:36
-1:08
Finish
26.22 mi13:54:083:27:357:559:00
8:50
+0:14

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

7:24 /mi

Average Pace

7:55 /mi

Slowest Pace

9:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

5:03

2% of race

Time at Steady Pace

2:26:46

71% of race

Time at Slower Pace

55:46

27% of race

Average Pace: 7:55 /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 mi10:49:5623:237:3223:23
7:32
#12454
10K
6.21 mi11:13:0746:347:3023:11
7:28
#12068
15K
9.32 mi11:36:231:09:507:3023:16
7:29
#11913
20K
12.43 mi12:00:101:33:377:3223:47
7:39
#11929
Half
13.11 mi12:05:131:38:407:325:03
7:24
#11862
25K
15.53 mi12:23:321:56:597:3218:19
7:33
#11594
30K
18.64 mi12:47:472:21:147:3524:15
7:48
#11248
20M
20.00 mi12:58:222:31:497:3510:35
7:47
#11007
21M
21.00 mi13:06:522:40:197:388:30
8:30
#10944
35K
21.75 mi13:13:492:47:167:416:57
9:17
#11327
23M
23.00 mi13:25:372:59:047:4711:48
9:25
#11854
24M
24.00 mi13:33:513:07:187:488:14
8:14
#11874
40K
24.85 mi13:42:103:15:377:528:19
9:44
#12265
25.2M
25.20 mi13:45:083:18:357:532:58
8:36
#12200
Finish
26.22 mi13:54:083:27:357:559:00
8:50
#12470
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi124549380938011664(Top 41%)8910(Top 55%)8910(Top 373%)
10K6.21 mi3.10 mi12068+3869187+1939187+19311728(Top 41%)9020(Top 56%)9020(Top 378%)
15K9.32 mi3.11 mi11913+1559103+849103+8411664(Top 41%)8910(Top 55%)8910(Top 373%)
20K12.43 mi3.11 mi11929-169060+439060+4311987(Top 42%)8969(Top 56%)8969(Top 376%)
Half13.11 mi0.68 mi11862+679022+389022+3810874(Top 38%)8499(Top 53%)8499(Top 356%)
25K15.53 mi2.42 mi11594+2688862+1608862+16010402(Top 37%)8094(Top 50%)8094(Top 339%)
30K18.64 mi3.11 mi11248+3468628+2348628+2349985(Top 35%)7686(Top 48%)7686(Top 322%)
20M20.00 mi1.36 mi11007+2418462+1668462+1668946(Top 31%)6970(Top 43%)6970(Top 292%)
21M21.00 mi1.00 mi10944+638399+638399+6310458(Top 37%)7596(Top 47%)7596(Top 318%)
35K21.75 mi0.75 mi11327-3838550-1518550-15119503(Top 69%)11722(Top 73%)11722(Top 491%)
23M23.00 mi1.25 mi11854-5278761-2118761-21118325(Top 65%)11123(Top 69%)11123(Top 466%)
24M24.00 mi1.00 mi11874-208738+238738+2312776(Top 45%)8539(Top 53%)8539(Top 358%)
40K24.85 mi0.85 mi12265-3918894-1568894-15619550(Top 69%)11576(Top 72%)11576(Top 485%)
25.2M25.20 mi0.35 mi12200+658845+498845+499412(Top 33%)6664(Top 41%)6664(Top 279%)
Finish26.22 mi1.02 mi12470-2708949-1048949-10418180(Top 64%)10953(Top 68%)10953(Top 459%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11664

Males

8910

M45-49

8910

5K→10K

3.1 - 6.2 mi

Top 41%
×5story building
+79ft-138ft

Overall

11728

Males

9020

M45-49

9020

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11664

Males

8910

M45-49

8910

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11987

Males

8969

M45-49

8969

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10874

Males

8499

M45-49

8499

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

10402

Males

8094

M45-49

8094

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9985

Males

7686

M45-49

7686

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8946

Males

6970

M45-49

6970

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

10458

Males

7596

M45-49

7596

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

19503

Males

11722

M45-49

11722

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18325

Males

11123

M45-49

11123

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12776

Males

8539

M45-49

8539

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

19550

Males

11576

M45-49

11576

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9412

Males

6664

M45-49

6664

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

18180

Males

10953

M45-49

10953

Passing Analysis

Category:
Athletes Passed
2351
Passed By
2367
Net Change
-16
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12454
5K → 10K506120+386#12454#12068
10K → 15K258103+155#12068#11913
15K → 20K195211-16#11913#11929
20K → Half8114+67#11929#11862
Half → 25K30133+268#11862#11594
25K → 30K40963+346#11594#11248
30K → 20M25918+241#11248#11007
20M → 21M12562+63#11007#10944
21M → 35K7390-383#10944#11327
35K → 23M28555-527#11327#11854
23M → 24M7494-20#11854#11874
24M → 40K14405-391#11874#12265
40K → 25.2M7611+65#12265#12200
25.2M → Finish18288-270#12200#12470
TOTALS23512367-16
📊

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