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BOSTON MARATHON 2025

Shaofeng Ren

Bib: 29829•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
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
9:27/mi
29:22
↑ 97↓ 3451.5%
10K· 6.21 mi
9:19/mi
58:20
↑ 79↓ 1380.4%
15K· 9.32 mi
9:11/mi
1:26:53
↑ 67↓ 78
20K· 12.43 mi
9:37/mi
1:56:47
↑ 106↓ 860.1%
Half· 13.11 mi
9:57/mi
2:03:34
↑ 19↓ 370.5%
25K· 15.53 mi
11:29/mi
2:31:24
↑ 66↓ 880.2%
30K· 18.64 mi
12:30/mi
3:10:13
↑ 181↓ 1480.2%
20M
13:28/mi
3:28:31
↑ 64↓ 500.2%
21M
14:48/mi
3:43:19
↑ 106↓ 241.6%
35K· 21.75 mi
12:12/mi
3:52:27
↑ 17↓ 861.7%
23M
12:47/mi
4:08:27
↑ 23↓ 630.6%
24M
14:21/mi
4:22:48
↓ 821.3%
40K· 24.85 mi
12:48/mi
4:33:45
↓ 200.3%
25.2M
15:05/mi
4:38:57
↑ 13↓ 160.2%
Finish· 26.22 mi
12:05/mi
4:51:16
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:03:34
Pace9:26 /mi
2nd Half
Distance13.11 mi
Time2:47:42
Pace12:48 /mi
📊Positive Split: 35.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:4329:229:2729:22
9:27
-
10K
6.21 mi12:18:4158:209:2328:58
9:19
-0:08
15K
9.32 mi12:47:141:26:539:1928:33
9:11
-0:08
20K
12.43 mi13:17:081:56:479:2429:54
9:37
+0:26
Half
13.11 mi13:23:552:03:349:266:47
9:57
+0:20
25K
15.53 mi13:51:452:31:249:4527:50
11:29
+1:32
30K
18.64 mi14:30:343:10:1310:1238:49
12:30
+1:01
20M
20.00 mi14:48:523:28:3110:2618:18
13:28
+0:58
21M
21.00 mi15:03:403:43:1910:3814:48
14:48
+1:20
35K
21.75 mi15:12:483:52:2710:419:08
12:12
-2:36
23M
23.00 mi15:28:484:08:2710:4816:00
12:47
+0:35
24M
24.00 mi15:43:094:22:4810:5714:21
14:21
+1:34
40K
24.85 mi15:54:064:33:4511:0110:57
12:48
-1:33
25.2M
25.20 mi15:59:184:38:5711:045:12
15:05
+2:17
Finish
26.22 mi16:11:374:51:1611:0712:19
12:05
-3:00

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

9:11 /mi

Average Pace

11:07 /mi

Slowest Pace

15:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:34

42% of race

Time at Steady Pace

1:55:03

39% of race

Time at Slower Pace

52:39

18% of race

Average Pace: 11:07 /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 mi11:49:4329:229:2729:22
9:27
#24077
10K
6.21 mi12:18:4158:209:2328:58
9:19
#23846
15K
9.32 mi12:47:141:26:539:1928:33
9:11
#23518
20K
12.43 mi13:17:081:56:479:2429:54
9:37
#23453
Half
13.11 mi13:23:552:03:349:266:47
9:57
#23543
25K
15.53 mi13:51:452:31:249:4527:50
11:29
#24093
30K
18.64 mi14:30:343:10:1310:1238:49
12:30
#24661
20M
20.00 mi14:48:523:28:3110:2618:18
13:28
#24924
21M
21.00 mi15:03:403:43:1910:3814:48
14:48
#25115
35K
21.75 mi15:12:483:52:2710:419:08
12:12
#25165
23M
23.00 mi15:28:484:08:2710:4816:00
12:47
#25224
24M
24.00 mi15:43:094:22:4810:5714:21
14:21
#25420
40K
24.85 mi15:54:064:33:4511:0110:57
12:48
#25459
25.2M
25.20 mi15:59:184:38:5711:045:12
15:05
#25521
Finish
26.22 mi16:11:374:51:1611:0712:19
12:05
#25598
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi24077142791427922832(Top 80%)13762(Top 85%)13762(Top 577%)
10K6.21 mi3.10 mi23846+23114184+9514184+9523601(Top 83%)14075(Top 87%)14075(Top 590%)
15K9.32 mi3.11 mi23518+32814033+15114033+15122832(Top 80%)13762(Top 85%)13762(Top 577%)
20K12.43 mi3.11 mi23453+6514019+1414019+1423276(Top 82%)13928(Top 86%)13928(Top 584%)
Half13.11 mi0.68 mi23543-9014052-3314052-3324714(Top 87%)14537(Top 90%)14537(Top 609%)
25K15.53 mi2.42 mi24093-55014275-22314275-22325831(Top 91%)14997(Top 93%)14997(Top 629%)
30K18.64 mi3.11 mi24661-56814504-22914504-22926174(Top 92%)15064(Top 94%)15064(Top 631%)
20M20.00 mi1.36 mi24924-26314605-10114605-10126865(Top 95%)15310(Top 95%)15310(Top 642%)
21M21.00 mi1.00 mi25115-19114683-7814683-7826992(Top 95%)15358(Top 95%)15358(Top 644%)
35K21.75 mi0.75 mi25165-5014691-814691-826145(Top 92%)14911(Top 93%)14911(Top 625%)
23M23.00 mi1.25 mi25224-5914709-1814709-1826130(Top 92%)14905(Top 93%)14905(Top 625%)
24M24.00 mi1.00 mi25420-19614783-7414783-7427810(Top 98%)15710(Top 98%)15710(Top 658%)
40K24.85 mi0.85 mi25459-3914793-1014793-1026083(Top 92%)14835(Top 92%)14835(Top 622%)
25.2M25.20 mi0.35 mi25521-6214810-1714810-1727187(Top 96%)15374(Top 95%)15374(Top 644%)
Finish26.22 mi1.02 mi25598-7714836-2614836-2626896(Top 95%)15245(Top 95%)15245(Top 639%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

22832

Males

13762

M45-49

13762

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

23601

Males

14075

M45-49

14075

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

22832

Males

13762

M45-49

13762

15K→20K

9.3 - 12.4 mi

Top 82%
×5story building
+106ft-86ft

Overall

23276

Males

13928

M45-49

13928

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

24714

Males

14537

M45-49

14537

Half→25K

13.1 - 15.5 mi

Top 91%
×4story building
+66ft-88ft

Overall

25831

Males

14997

M45-49

14997

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

26174

Males

15064

M45-49

15064

30K→20M

18.6 - 20.0 mi

Top 95%
×5story building
+64ft-50ft

Overall

26865

Males

15310

M45-49

15310

20M→21M

20.0 - 21.0 mi

Top 95%
×8story building
+106ft-24ft

Overall

26992

Males

15358

M45-49

15358

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

26145

Males

14911

M45-49

14911

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

26130

Males

14905

M45-49

14905

23M→24M

23.0 - 24.0 mi

Top 98%
×6story building
+12ft-82ft

Overall

27810

Males

15710

M45-49

15710

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26083

Males

14835

M45-49

14835

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

27187

Males

15374

M45-49

15374

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2story building
+22ft-21ft

Overall

26896

Males

15245

M45-49

15245

Passing Analysis

Category:
Athletes Passed
1077
Passed By
2598
Net Change
-1521
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24077
5K → 10K376145+231#24077#23846
10K → 15K36133+328#23846#23518
15K → 20K178113+65#23518#23453
20K → Half797-90#23453#23543
Half → 25K23573-550#23543#24093
25K → 30K29597-568#24093#24661
30K → 20M14277-263#24661#24924
20M → 21M9200-191#24924#25115
21M → 35K1262-50#25115#25165
35K → 23M2685-59#25165#25224
23M → 24M7203-196#25224#25420
24M → 40K2362-39#25420#25459
40K → 25.2M365-62#25459#25521
25.2M → Finish986-77#25521#25598
TOTALS10772598-1521
📊

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