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BOSTON MARATHON 2025

Chris Sim

Bib: 25483•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M75-79)
#0 / 52
Top 21%
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
9:06/mi
28:17
↑ 97↓ 3451.5%
10K· 6.21 mi
8:37/mi
55:03
↑ 79↓ 1380.4%
15K· 9.32 mi
8:58/mi
1:22:53
↑ 67↓ 78
20K· 12.43 mi
9:23/mi
1:52:02
↑ 106↓ 860.1%
Half· 13.11 mi
9:04/mi
1:58:13
↑ 19↓ 370.5%
25K· 15.53 mi
9:36/mi
2:21:29
↑ 66↓ 880.2%
30K· 18.64 mi
10:05/mi
2:52:48
↑ 181↓ 1480.2%
20M
11:04/mi
3:07:51
↑ 64↓ 500.2%
21M
12:31/mi
3:20:22
↑ 106↓ 241.6%
35K· 21.75 mi
9:52/mi
3:27:45
↑ 17↓ 861.7%
23M
11:33/mi
3:42:13
↑ 23↓ 630.6%
24M
10:16/mi
3:52:29
↓ 821.3%
40K· 24.85 mi
10:36/mi
4:01:33
↓ 200.3%
25.2M
11:24/mi
4:05:29
↑ 13↓ 160.2%
Finish· 26.22 mi
10:18/mi
4:15:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:13
Pace9:01 /mi
2nd Half
Distance13.11 mi
Time2:17:46
Pace10:31 /mi
📊Positive Split: 16.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:1128:179:0628:17
9:06
-
10K
6.21 mi11:54:5755:038:5226:46
8:37
-0:29
15K
9.32 mi12:22:471:22:538:5427:50
8:58
+0:21
20K
12.43 mi12:51:561:52:029:0129:09
9:23
+0:25
Half
13.11 mi12:58:071:58:139:016:11
9:04
-0:19
25K
15.53 mi13:21:232:21:299:0623:16
9:36
+0:32
30K
18.64 mi13:52:422:52:489:1631:19
10:05
+0:29
20M
20.00 mi14:07:453:07:519:2415:03
11:04
+0:59
21M
21.00 mi14:20:163:20:229:3212:31
12:31
+1:27
35K
21.75 mi14:27:393:27:459:337:23
9:52
-2:39
23M
23.00 mi14:42:073:42:139:4014:28
11:33
+1:41
24M
24.00 mi14:52:233:52:299:4110:16
10:16
-1:17
40K
24.85 mi15:01:274:01:339:439:04
10:36
+0:20
25.2M
25.20 mi15:05:234:05:299:443:56
11:24
+0:48
Finish
26.22 mi15:15:534:15:599:4610:30
10:18
-1:06

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

8:37 /mi

Average Pace

9:46 /mi

Slowest Pace

12:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:13

46% of race

Time at Steady Pace

1:31:48

36% of race

Time at Slower Pace

45:58

18% of race

Average Pace: 9:46 /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 mi11:28:1128:179:0628:17
9:06
#22864
10K
6.21 mi11:54:5755:038:5226:46
8:37
#21754
15K
9.32 mi12:22:471:22:538:5427:50
8:58
#21778
20K
12.43 mi12:51:561:52:029:0129:09
9:23
#22001
Half
13.11 mi12:58:071:58:139:016:11
9:04
#22004
25K
15.53 mi13:21:232:21:299:0623:16
9:36
#22031
30K
18.64 mi13:52:422:52:489:1631:19
10:05
#22054
20M
20.00 mi14:07:453:07:519:2415:03
11:04
#22225
21M
21.00 mi14:20:163:20:229:3212:31
12:31
#22379
35K
21.75 mi14:27:393:27:459:337:23
9:52
#22347
23M
23.00 mi14:42:073:42:139:4014:28
11:33
#22486
24M
24.00 mi14:52:233:52:299:4110:16
10:16
#22446
40K
24.85 mi15:01:274:01:339:439:04
10:36
#22428
25.2M
25.20 mi15:05:234:05:299:443:56
11:24
#22417
Finish
26.22 mi15:15:534:15:599:4610:30
10:18
#22475
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM75-79Seg. OverallSeg. MalesSeg. M75-79
5K3.11 mi3.11 mi22864137001370021842(Top 77%)13320(Top 83%)13320(Top 25615%)
10K6.21 mi3.10 mi21754+111013220+48013220+48020432(Top 72%)12674(Top 79%)12674(Top 24373%)
15K9.32 mi3.11 mi21778-2413234-1413234-1421842(Top 77%)13320(Top 83%)13320(Top 25615%)
20K12.43 mi3.11 mi22001-22313343-10913343-10922513(Top 79%)13582(Top 84%)13582(Top 26119%)
Half13.11 mi0.68 mi22004-313345-213345-222064(Top 78%)13368(Top 83%)13368(Top 25708%)
25K15.53 mi2.42 mi22031-2713351-613351-622172(Top 78%)13367(Top 83%)13367(Top 25706%)
30K18.64 mi3.11 mi22054-2313344+713344+721826(Top 77%)13082(Top 81%)13082(Top 25158%)
20M20.00 mi1.36 mi22225-17113399-5513399-5523737(Top 84%)13862(Top 86%)13862(Top 26658%)
21M21.00 mi1.00 mi22379-15413441-4213441-4224422(Top 86%)14111(Top 88%)14111(Top 27137%)
35K21.75 mi0.75 mi22347+3213414+2713414+2721523(Top 76%)12683(Top 79%)12683(Top 24390%)
23M23.00 mi1.25 mi22486-13913444-3013444-3024348(Top 86%)14017(Top 87%)14017(Top 26956%)
24M24.00 mi1.00 mi22446+4013404+4013404+4022124(Top 78%)12869(Top 80%)12869(Top 24748%)
40K24.85 mi0.85 mi22428+1813374+3013374+3022191(Top 78%)12832(Top 80%)12832(Top 24677%)
25.2M25.20 mi0.35 mi22417+1113356+1813356+1821793(Top 77%)12690(Top 79%)12690(Top 24404%)
Finish26.22 mi1.02 mi22475-5813369-1313369-1323796(Top 84%)13665(Top 85%)13665(Top 26279%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21842

Males

13320

M75-79

13320

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20432

Males

12674

M75-79

12674

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21842

Males

13320

M75-79

13320

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22513

Males

13582

M75-79

13582

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

22064

Males

13368

M75-79

13368

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

22172

Males

13367

M75-79

13367

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

21826

Males

13082

M75-79

13082

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

23737

Males

13862

M75-79

13862

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

24422

Males

14111

M75-79

14111

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

21523

Males

12683

M75-79

12683

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24348

Males

14017

M75-79

14017

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

22124

Males

12869

M75-79

12869

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

22191

Males

12832

M75-79

12832

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21793

Males

12690

M75-79

12690

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

23796

Males

13665

M75-79

13665

Passing Analysis

Category:
Athletes Passed
2147
Passed By
1758
Net Change
+389
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22864
5K → 10K112616+1110#22864#21754
10K → 15K189213-24#21754#21778
15K → 20K127350-223#21778#22001
20K → Half3134-3#22001#22004
Half → 25K142169-27#22004#22031
25K → 30K177200-23#22031#22054
30K → 20M48219-171#22054#22225
20M → 21M41195-154#22225#22379
21M → 35K5826+32#22379#22347
35K → 23M38177-139#22347#22486
23M → 24M7030+40#22486#22446
24M → 40K5234+18#22446#22428
40K → 25.2M2312+11#22428#22417
25.2M → Finish2583-58#22417#22475
TOTALS21471758+389
📊

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