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BOSTON MARATHON 2025

Nick Sia

Bib: 31926•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
8:50/mi
27:27
↑ 97↓ 3451.5%
10K· 6.21 mi
8:39/mi
54:19
↑ 79↓ 1380.4%
15K· 9.32 mi
8:49/mi
1:21:44
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:48:10
↑ 106↓ 860.1%
Half· 13.11 mi
8:17/mi
1:53:49
↑ 19↓ 370.5%
25K· 15.53 mi
8:34/mi
2:14:35
↑ 66↓ 880.2%
30K· 18.64 mi
8:36/mi
2:41:19
↑ 181↓ 1480.2%
20M
8:46/mi
2:53:14
↑ 64↓ 500.2%
21M
9:19/mi
3:02:33
↑ 106↓ 241.6%
35K· 21.75 mi
8:28/mi
3:08:53
↑ 17↓ 861.7%
23M
8:46/mi
3:19:52
↑ 23↓ 630.6%
24M
8:34/mi
3:28:26
↓ 821.3%
40K· 24.85 mi
8:32/mi
3:35:44
↓ 200.3%
25.2M
9:02/mi
3:38:51
↑ 13↓ 160.2%
Finish· 26.22 mi
8:06/mi
3:47:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:53:49
Pace8:41 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:53:17
Pace8:38 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:4527:278:5027:27
8:50
-
10K
6.21 mi12:17:3754:198:4426:52
8:39
-0:11
15K
9.32 mi12:45:021:21:448:4627:25
8:49
+0:10
20K
12.43 mi13:11:281:48:108:4226:26
8:30
-0:19
Half
13.11 mi13:17:071:53:498:415:39
8:17
-0:13
25K
15.53 mi13:37:532:14:358:4020:46
8:34
+0:17
30K
18.64 mi14:04:372:41:198:3926:44
8:36
+0:02
20M
20.00 mi14:16:322:53:148:4011:55
8:46
+0:10
21M
21.00 mi14:25:513:02:338:429:19
9:19
+0:33
35K
21.75 mi14:32:113:08:538:416:20
8:28
-0:51
23M
23.00 mi14:43:103:19:528:4110:59
8:46
+0:18
24M
24.00 mi14:51:443:28:268:418:34
8:34
-0:12
40K
24.85 mi14:59:023:35:448:417:18
8:32
-0:02
25.2M
25.20 mi15:02:093:38:518:413:07
9:02
+0:30
Finish
26.22 mi15:10:243:47:068:408:15
8:06
-0:56

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

8:06 /mi

Average Pace

8:40 /mi

Slowest Pace

9:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:34:40

95% of race

Time at Steady Pace

12:26

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:40 /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 mi11:50:4527:278:5027:27
8:50
#21682
10K
6.21 mi12:17:3754:198:4426:52
8:39
#21105
15K
9.32 mi12:45:021:21:448:4627:25
8:49
#21078
20K
12.43 mi13:11:281:48:108:4226:26
8:30
#20446
Half
13.11 mi13:17:071:53:498:415:39
8:17
#20304
25K
15.53 mi13:37:532:14:358:4020:46
8:34
#19858
30K
18.64 mi14:04:372:41:198:3926:44
8:36
#19064
20M
20.00 mi14:16:322:53:148:4011:55
8:46
#18801
21M
21.00 mi14:25:513:02:338:429:19
9:19
#18575
35K
21.75 mi14:32:113:08:538:416:20
8:28
#18452
23M
23.00 mi14:43:103:19:528:4110:59
8:46
#18219
24M
24.00 mi14:51:443:28:268:418:34
8:34
#18056
40K
24.85 mi14:59:023:35:448:417:18
8:32
#17886
25.2M
25.20 mi15:02:093:38:518:413:07
9:02
#17779
Finish
26.22 mi15:10:243:47:068:408:15
8:06
#17621
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21682131671316721134(Top 74%)12998(Top 81%)12998(Top 230%)
10K6.21 mi3.10 mi21105+57712935+23212935+23220579(Top 72%)12730(Top 79%)12730(Top 226%)
15K9.32 mi3.11 mi21078+2712940-512940-521134(Top 74%)12998(Top 81%)12998(Top 230%)
20K12.43 mi3.11 mi20446+63212660+28012660+28018293(Top 64%)11742(Top 73%)11742(Top 208%)
Half13.11 mi0.68 mi20304+14212592+6812592+6817788(Top 63%)11533(Top 72%)11533(Top 204%)
25K15.53 mi2.42 mi19858+44612400+19212400+19217570(Top 62%)11348(Top 70%)11348(Top 201%)
30K18.64 mi3.11 mi19064+79412012+38812012+38815419(Top 54%)10245(Top 64%)10245(Top 182%)
20M20.00 mi1.36 mi18801+26311889+12311889+12315483(Top 55%)10146(Top 63%)10146(Top 180%)
21M21.00 mi1.00 mi18575+22611758+13111758+13115226(Top 54%)9886(Top 61%)9886(Top 175%)
35K21.75 mi0.75 mi18452+12311691+6711691+6715239(Top 54%)9838(Top 61%)9838(Top 174%)
23M23.00 mi1.25 mi18219+23311555+13611555+13614953(Top 53%)9605(Top 60%)9605(Top 170%)
24M24.00 mi1.00 mi18056+16311460+9511460+9514934(Top 53%)9561(Top 59%)9561(Top 169%)
40K24.85 mi0.85 mi17886+17011356+10411356+10413671(Top 48%)8852(Top 55%)8852(Top 157%)
25.2M25.20 mi0.35 mi17779+10711293+6311293+6312011(Top 42%)8022(Top 50%)8022(Top 142%)
Finish26.22 mi1.02 mi17621+15811201+9211201+9213555(Top 48%)8800(Top 55%)8800(Top 156%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

21134

Males

12998

M18-39

12998

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20579

Males

12730

M18-39

12730

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

21134

Males

12998

M18-39

12998

15K→20K

9.3 - 12.4 mi

Top 64%
×5story building
+106ft-86ft

Overall

18293

Males

11742

M18-39

11742

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

17788

Males

11533

M18-39

11533

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17570

Males

11348

M18-39

11348

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

15419

Males

10245

M18-39

10245

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15483

Males

10146

M18-39

10146

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

15226

Males

9886

M18-39

9886

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15239

Males

9838

M18-39

9838

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

14953

Males

9605

M18-39

9605

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14934

Males

9561

M18-39

9561

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13671

Males

8852

M18-39

8852

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

12011

Males

8022

M18-39

8022

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

13555

Males

8800

M18-39

8800

Passing Analysis

Category:
Athletes Passed
4397
Passed By
336
Net Change
+4061
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21682
5K → 10K66588+577#21682#21105
10K → 15K201174+27#21105#21078
15K → 20K6386+632#21078#20446
20K → Half1431+142#20446#20304
Half → 25K45711+446#20304#19858
25K → 30K7951+794#19858#19064
30K → 20M2696+263#19064#18801
20M → 21M24115+226#18801#18575
21M → 35K1318+123#18575#18452
35K → 23M2385+233#18452#18219
23M → 24M1696+163#18219#18056
24M → 40K1755+170#18056#17886
40K → 25.2M1070+107#17886#17779
25.2M → Finish16810+158#17779#17621
TOTALS4397336+4061
📊

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