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BOSTON MARATHON 2025

Masashi Furukawa

Bib: 9691•M

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 30%
Gender (Male)
#0 / 16105
Top 43%
Masters (Masters Men)
#0 / 10463
Top 31%
Division (M45-49)
#0 / 2386
Top 44%
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
6:55/mi
21:30
↑ 97↓ 3451.5%
10K· 6.21 mi
6:53/mi
42:53
↑ 79↓ 1380.4%
15K· 9.32 mi
6:51/mi
1:04:11
↑ 67↓ 78
20K· 12.43 mi
7:14/mi
1:26:38
↑ 106↓ 860.1%
Half· 13.11 mi
7:01/mi
1:31:25
↑ 19↓ 370.5%
25K· 15.53 mi
7:11/mi
1:48:49
↑ 66↓ 880.2%
30K· 18.64 mi
7:49/mi
2:13:06
↑ 181↓ 1480.2%
20M
8:03/mi
2:24:03
↑ 64↓ 500.2%
21M
8:45/mi
2:32:48
↑ 106↓ 241.6%
35K· 21.75 mi
7:45/mi
2:38:36
↑ 17↓ 861.7%
23M
8:14/mi
2:48:55
↑ 23↓ 630.6%
24M
8:06/mi
2:57:01
↓ 821.3%
40K· 24.85 mi
8:05/mi
3:03:56
↓ 200.3%
25.2M
9:14/mi
3:07:07
↑ 13↓ 160.2%
Finish· 26.22 mi
7:39/mi
3:14:55
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:25
Pace6:58 /mi
2nd Half
Distance13.11 mi
Time1:43:30
Pace7:54 /mi
📊Positive Split: 13.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:3121:306:5521:30
6:55
-
10K
6.21 mi11:08:5442:536:5421:23
6:53
-0:02
15K
9.32 mi11:30:121:04:116:5321:18
6:51
-0:02
20K
12.43 mi11:52:391:26:386:5822:27
7:14
+0:23
Half
13.11 mi11:57:261:31:256:584:47
7:01
-0:13
25K
15.53 mi12:14:501:48:497:0017:24
7:11
+0:10
30K
18.64 mi12:39:072:13:067:0824:17
7:49
+0:38
20M
20.00 mi12:50:042:24:037:1210:57
8:03
+0:14
21M
21.00 mi12:58:492:32:487:178:45
8:45
+0:42
35K
21.75 mi13:04:372:38:367:185:48
7:45
-1:00
23M
23.00 mi13:14:562:48:557:2110:19
8:14
+0:29
24M
24.00 mi13:23:022:57:017:238:06
8:06
-0:08
40K
24.85 mi13:29:573:03:567:246:55
8:05
-0:01
25.2M
25.20 mi13:33:083:07:077:263:11
9:14
+1:09
Finish
26.22 mi13:40:563:14:557:267:48
7:39
-1:35

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

6:51 /mi

Average Pace

7:26 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:49

56% of race

Time at Steady Pace

55:45

29% of race

Time at Slower Pace

30:21

16% of race

Average Pace: 7:26 /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 mi10:47:3121:306:5521:30
6:55
#7229
10K
6.21 mi11:08:5442:536:5421:23
6:53
#7170
15K
9.32 mi11:30:121:04:116:5321:18
6:51
#6970
20K
12.43 mi11:52:391:26:386:5822:27
7:14
#7303
Half
13.11 mi11:57:261:31:256:584:47
7:01
#7315
25K
15.53 mi12:14:501:48:497:0017:24
7:11
#7296
30K
18.64 mi12:39:072:13:067:0824:17
7:49
#7613
20M
20.00 mi12:50:042:24:037:1210:57
8:03
#7761
21M
21.00 mi12:58:492:32:487:178:45
8:45
#7936
35K
21.75 mi13:04:372:38:367:185:48
7:45
#8001
23M
23.00 mi13:14:562:48:557:2110:19
8:14
#8177
24M
24.00 mi13:23:022:57:017:238:06
8:06
#8293
40K
24.85 mi13:29:573:03:567:246:55
8:05
#8358
25.2M
25.20 mi13:33:083:07:077:263:11
9:14
#8441
Finish
26.22 mi13:40:563:14:557:267:48
7:39
#8522
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7229647064706650(Top 23%)5988(Top 37%)5988(Top 251%)
10K6.21 mi3.10 mi7170+596422+486422+487114(Top 25%)6366(Top 40%)6366(Top 267%)
15K9.32 mi3.11 mi6970+2006263+1596263+1596650(Top 23%)5988(Top 37%)5988(Top 251%)
20K12.43 mi3.11 mi7303-3336493-2306493-2308412(Top 30%)7116(Top 44%)7116(Top 298%)
Half13.11 mi0.68 mi7315-126496-36496-37669(Top 27%)6690(Top 42%)6690(Top 280%)
25K15.53 mi2.42 mi7296+196464+326464+327430(Top 26%)6401(Top 40%)6401(Top 268%)
30K18.64 mi3.11 mi7613-3176636-1726636-17210057(Top 35%)7711(Top 48%)7711(Top 323%)
20M20.00 mi1.36 mi7761-1486696-606696-6010799(Top 38%)7933(Top 49%)7933(Top 332%)
21M21.00 mi1.00 mi7936-1756761-656761-6511943(Top 42%)8339(Top 52%)8339(Top 349%)
35K21.75 mi0.75 mi8001-656784-236784-2310411(Top 37%)7565(Top 47%)7565(Top 317%)
23M23.00 mi1.25 mi8177-1766852-686852-6811599(Top 41%)8027(Top 50%)8027(Top 336%)
24M24.00 mi1.00 mi8293-1166891-396891-3911860(Top 42%)8086(Top 50%)8086(Top 339%)
40K24.85 mi0.85 mi8358-656893-26893-210750(Top 38%)7428(Top 46%)7428(Top 311%)
25.2M25.20 mi0.35 mi8441-836927-346927-3412994(Top 46%)8439(Top 52%)8439(Top 354%)
Finish26.22 mi1.02 mi8522-816948-216948-2110313(Top 36%)7143(Top 44%)7143(Top 299%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21story building
+97ft-345ft

Overall

6650

Males

5988

M45-49

5988

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

7114

Males

6366

M45-49

6366

10K→15K

6.2 - 9.3 mi

Top 23%
×3story building
+67ft-78ft

Overall

6650

Males

5988

M45-49

5988

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

8412

Males

7116

M45-49

7116

20K→Half

12.4 - 13.1 mi

Top 27%
×2story building
+19ft-37ft

Overall

7669

Males

6690

M45-49

6690

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7430

Males

6401

M45-49

6401

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

10057

Males

7711

M45-49

7711

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10799

Males

7933

M45-49

7933

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11943

Males

8339

M45-49

8339

21M→35K

21.0 - 21.8 mi

Top 37%
×7story building
+17ft-86ft

Overall

10411

Males

7565

M45-49

7565

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11599

Males

8027

M45-49

8027

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

11860

Males

8086

M45-49

8086

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10750

Males

7428

M45-49

7428

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12994

Males

8439

M45-49

8439

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

10313

Males

7143

M45-49

7143

Passing Analysis

Category:
Athletes Passed
1161
Passed By
2454
Net Change
-1293
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7229
5K → 10K239180+59#7229#7170
10K → 15K24949+200#7170#6970
15K → 20K54387-333#6970#7303
20K → Half1931-12#7303#7315
Half → 25K120101+19#7315#7296
25K → 30K106423-317#7296#7613
30K → 20M54202-148#7613#7761
20M → 21M60235-175#7761#7936
21M → 35K41106-65#7936#8001
35K → 23M61237-176#8001#8177
23M → 24M52168-116#8177#8293
24M → 40K50115-65#8293#8358
40K → 25.2M19102-83#8358#8441
25.2M → Finish37118-81#8441#8522
TOTALS11612454-1293
📊

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